MOBIL CORP
11-K, 1998-05-13
PETROLEUM REFINING
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                              SEC File No 33-18130







                         SECURITIES AND EXCHANGE COMMISSION

                              WASHINGTON, DC 20549-1004




                                      FORM 11-K


                                    ANNUAL REPORT


                          Pursuant to Section 15(d) of the
                          Securities Exchange Act of 1934


                     For the fiscal year ended January 31, 1998


                              EMPLOYEES SAVINGS PLAN OF
                                MOBIL OIL CORPORATION

                               (Full title of the plan)



                                  MOBIL CORPORATION
                        3225 Gallows Road, Fairfax, Virginia
                                     22037-0001
                              Telephone:  (703) 846-3000


            (Name of issuer of the securities held pursuant to the plan and
                      the address of its principal executive office)

                                      13-2850309

                           (IRS Employer Identification No.)


<PAGE>



           EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                             FORM 11-K
                     FOR THE FISCAL YEARS ENDED
                     JANUARY 31, 1997 AND 1998



                         TABLE OF CONTENTS



                                                                     Page

Report of Ernst & Young LLP, Independent Auditors..................    1
Statements of Net Assets Available for Benefits....................    2-3
Statements of Changes in Net Assets Available for Benefits.........    4-5
Notes to Plan Financial Statements.................................    6
Supplemental Information:
  Schedule of Assets Held for Investment Purposes..................   13
  Schedule of Reportable Transactions..............................   14
Signature..........................................................   15
Exhibit Index......................................................   16
Exhibit 23 - Consent of Ernst & Young LLP, Independent Auditors....   17


A schedule of  party-in-interest  transactions  has not been  presented  because
there were no such prohibited transactions.



<PAGE>





                            REPORT OF INDEPENDENT AUDITORS





Board of Directors
Mobil Oil Corporation


We have audited the accompanying statements of net assets available for benefits
of the Employees  Savings Plan of Mobil Oil Corporation (the Plan) as of January
31, 1997 and 1998, and the related statements of changes in net assets available
for  benefits  for the years then  ended.  These  financial  statements  are the
responsibility  of the Plan's  management.  Our  responsibility is to express an
opinion on these financial statements based on our audits.

We  conducted  our  audits  in  accordance  with  generally   accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all  material  respects,  the net assets  available  for benefits of the Plan at
January  31,  1997 and 1998,  and the  changes in its net assets  available  for
benefits  for the years  then  ended,  in  conformity  with  generally  accepted
accounting principles.

Our  audits  were  made for the  purpose  of  forming  an  opinion  on the basic
financial statements taken as a whole. The accompanying  supplemental  schedules
of assets held for  investment  purposes  as of January 31, 1998 and  reportable
transactions  for the year ended January 31, 1998, are presented for purposes of
complying with the Department of Labor's Rules and Regulations for Reporting and
Disclosure  under the Employee  Retirement  Income Security Act of 1974, and are
not a  required  part  of  the  basic  financial  statements.  The  supplemental
schedules have been subjected to the auditing  procedures  applied in our audits
of the basic financial  statements and, in our opinion, are fairly stated in all
material  respects  in  relation to the basic  financial  statements  taken as a
whole.








Fairfax, Virginia                                   Ernst & Young LLP
April 15, 1998

                                                         - 1 -

<PAGE>

<TABLE>
<CAPTION>


                          EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                          STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
                                         JANUARY 31, 1997
                                       (millions of dollars)
<S>                         <C>     <C>        <C>      <C>       <C>    <C>     <C>      <C>
                                    MOBIL      LONG-
                            MOBIL   ESOP       TERM               OTHER  OTHER   PARTIC-
                            COMMON  PREFERRED  FIXED    JENNISON  LOWER  HIGHER  IPANT
                            STOCK   STOCK      INCOME   EQUITY    RISK   RISK    LOAN
                            FUND    FUND       FUND     FUND      FUNDS  FUNDS   FUND     TOTAL
                          ----------------------------------------------------------------------
Investments, at
  current value           $1,975    $1,152     $800     $710      $403   $201    $87      $5,328
Contributions receivable:
  Company                      1       163        -        -         -      -      -         164
  Participants                 4         -        3        2         2      1      -          12
Dividends and interest
  receivable                   -        22        -        -         -      -      1          23
Loan repayments
  receivable                   -         -        -        -         -      -      2           2
Cash                           -         -        -        -        11      -      -          11
                          ----------------------------------------------------------------------
      Total assets         1,980     1,337      803      712       416    202     90       5,540
                          ----------------------------------------------------------------------
Accrued interest
  payable                      -       (19)       -        -         -      -      -         (19)
ESOP debt                      -      (526)       -        -         -      -      -        (526)
                          ----------------------------------------------------------------------
     Total liabilities         -      (545)       -        -         -      -      -        (545)
                          ----------------------------------------------------------------------
     Net assets available
       for benefits       $1,980    $  792     $803     $712      $416   $202    $90      $4,995
                          ======================================================================










                                                 See accompanying notes
</TABLE>
                                                              - 2 -

<PAGE>

<TABLE>
<CAPTION>


                          EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                          STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
                                         JANUARY 31, 1998
                                       (millions of dollars)
<S>
                            <C>     <C>        <C>      <C>       <C>    <C>     <C>      <C>
                                    MOBIL      LONG-
                            MOBIL   ESOP       TERM               OTHER  OTHER   PARTIC-
                            COMMON  PREFERRED  FIXED    JENNISON  LOWER  HIGHER  IPANT
                            STOCK   STOCK      INCOME   EQUITY    RISK   RISK    LOAN
                            FUND    FUND       FUND     FUND      FUNDS  FUNDS   FUND     TOTAL
                          ----------------------------------------------------------------------
Investments, at
  current value           $2,093    $1,168     $699     $856      $429   $220    $82      $5,547
Contributions receivable:
  Company                      1       171        -        -         -      -      -         172
  Participants                 3         -        1        1         1      1      -           7
Dividends and interest
  receivable                   -        21        -        -         -      -      1          22
Loan repayments
  receivable                   -         -        -        -         -      -      2           2
Cash                           -         -        -        -         5      -      -           5
                          ----------------------------------------------------------------------
      Total assets         2,097     1,360      700      857       435    221     85       5,755
                          ----------------------------------------------------------------------
Accrued interest
  payable                      -       (17)       -        -         -      -      -         (17)
ESOP debt                      -      (497)       -        -         -      -      -        (497)
                          ----------------------------------------------------------------------
     Total liabilities         -      (514)       -        -         -      -      -        (514)
                          ----------------------------------------------------------------------
     Net assets available
       for benefits       $2,097    $  846     $700     $857      $435   $221    $85      $5,241
                          ======================================================================











                                               See accompanying notes
</TABLE>
                                                         - 3 -

<PAGE>


<TABLE>
<CAPTION>


                          EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                     STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS
                                    YEAR ENDED JANUARY 31, 1997
                                       (millions of dollars)
<S>                         <C>     <C>        <C>      <C>       <C>    <C>     <C>      <C>
                                    MOBIL      LONG-
                            MOBIL   ESOP       TERM               OTHER  OTHER   PARTIC-
                            COMMON  PREFERRED  FIXED    JENNISON  LOWER  HIGHER  IPANT
                            STOCK   STOCK      INCOME   EQUITY    RISK   RISK    LOAN
                            FUND    FUND       FUND     FUND      FUNDS  FUNDS   FUND     TOTAL
                          ----------------------------------------------------------------------
Contributions
  Company                 $   18      $ 39     $  -     $  -      $  -   $  -    $ -      $   57
  Participants                36         -       16       20        11      7      -          90

Investment income
  Dividends                   67        53        -        -         -      -      -         120
  Interest and other
    investment income          -         -       39        -        50     21      6         116
  Realized and unrealized
    gains and (losses)
    on investments           341       183        -      161         4      3      -         692
                          ----------------------------------------------------------------------
  Total investment income    408       236       39      161        54     24      6         928
                          ----------------------------------------------------------------------
Interest on ESOP debt          -       (47)       -        -         -      -      -         (47)
Distributions to
  participants              (227)      (38)    (178)     (53)      (90)    (6)    (9)       (601)
Transfers in (Notes 1 & 5)    11         -       23        7        21      8      1          71
Transfers out (Note 1)        (1)        -        -       (1)        -      -      -          (2)
Inter-fund transfers        (229)      (15)     332        9      (176)    83     (4)          -
                          ----------------------------------------------------------------------
  Net increase in net
    assets available
    for benefits              16       175      232      143      (180)   116     (6)        496

Net assets available for benefits:
  At beginning of year     1,964       617      571      569       596     86     96       4,499
                          ----------------------------------------------------------------------
  At end of year          $1,980      $792     $803     $712      $416   $202    $90      $4,995
                          ======================================================================


                                                 See accompanying notes
</TABLE>
                                                         - 4 -

<PAGE>

<TABLE>
<CAPTION>



                          EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                     STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS
                                    YEAR ENDED JANUARY 31, 1998
                                       (millions of dollars)
<S>                         <C>     <C>        <C>      <C>       <C>    <C>     <C>      <C>
                                    MOBIL      LONG-
                            MOBIL   ESOP       TERM               OTHER  OTHER   PARTIC-
                            COMMON  PREFERRED  FIXED    JENNISON  LOWER  HIGHER  IPANT
                            STOCK   STOCK      INCOME   EQUITY    RISK   RISK    LOAN
                            FUND    FUND       FUND     FUND      FUNDS  FUNDS   FUND     TOTAL
                            --------------------------------------------------------------------
Contributions
  Company                 $   17      $ 29     $  -     $  -      $  -   $  -    $ -      $   46
  Participants                34         -        9       18        11      9      -          81

Investment income
  Dividends                   64        52        -        -         -      -      -         116
  Interest and other
    investment income          -         -       47        -        40      5      7          99
  Realized and unrealized
    gains and losses on
    investments               90        51        -      194         9      6      -         350
                          ----------------------------------------------------------------------
  Total investment income    154       103       47      194        49     11      7         565
                          ----------------------------------------------------------------------
Interest on ESOP debt          -       (43)       -        -         -      -      -         (43)
Distributions to
  participants              (154)      (24)    (130)     (47)      (45)   (13)    (4)       (417)
Transfers in (Notes 1 & 5)     3         -        5        2         3      1      -          14
Transfers out                  -         -        -        -         -      -      -           -
Inter-fund transfers          63       (11)     (34)     (22)        1     11     (8)          -
                          ----------------------------------------------------------------------
  Net increase in net
    assets available
    for benefits             117        54     (103)      145       19     19     (5)        246

Net assets available for benefits:
  At beginning of year     1,980       792      803       712      416    202     90       4,995
                          ----------------------------------------------------------------------
  At end of year          $2,097      $846     $700      $857     $435   $221    $85      $5,241
                          ======================================================================


                                                 See accompanying notes
</TABLE>
                                                         - 5 -

<PAGE>



              EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                     NOTES TO PLAN FINANCIAL STATEMENTS
                           JANUARY 31, 1997 and 1998


Note 1.  Description of the Plan

Eligibility  -  Through  December  31,  1997,  regular  employees  of Mobil  Oil
Corporation and its participating  affiliates  (Mobil) generally became eligible
to participate in the Employees Savings Plan of Mobil Oil Corporation (the Plan)
on the first of the month after  completion  of one year of  service.  Effective
January 1, 1998, most employees are  immediately  eligible to participate in the
Plan.  Films  division  employees  hired  after  April 1,  1998 or later  become
eligible to participate  in the Plan on the first of the month after  completing
one year of service.

Concurrent  with  the  sale to  Tenneco  of Mobil  Chemical  Company's  Plastics
Division in  November  1995,  the  following  provisions  were made for its Plan
participants:  (i) all accounts  became fully  vested,  (ii)  participants  were
allowed under certain  conditions to transfer their account balances directly to
a Tenneco plan during a window  period from April 1, 1996 through  September 30,
1996, (iii) a lump sum distribution window was opened through December 31, 1997,
and (iv)  participants  became  eligible to initiate  loans during the five year
period ending  November 17, 2000.  During the Plan years ended January 31, 1997,
participants  transferred  from their accounts a total $2,177,733 to the Tenneco
Plan.

On October 1, 1996, the Station Operators, Inc. Retirement Savings Plan of Mobil
Oil Corporation (the SOI Plan) was merged into the Plan. Participants in the SOI
Plan became  participants  in the Plan,  except that they became  ineligible  to
receive Mobil's  contributions in the Plan's 401(k) Account. The merger resulted
in the transfer of net assets totaling $5,188,040 to the Plan.

On November 1, 1996, Mobil's Pasadena Hourly Thrift Plan (the Pasadena Plan) was
merged into the Plan.  Participants in the Pasadena plan became  participants in
the Plan, except that they became ineligible to receive Mobil's contributions in
the Plan's 401(k)  Account,  and became eligible to receive a 2% ESOP allocation
in the Plan's Savings Account. The merger resulted in the transfer of net assets
totalling $1,947,028 to the Plan.

Contributions - The Plan is composed of two parts:

Savings  Account - Employees  can make  after-tax  contributions  to the Savings
Account  of the Plan,  subject  to  certain  tax law  limitations.  The  maximum
permitted  employee  contribution  to the  Savings  Account  is 15% of  benefits
bearing pay (plus certain make-up  contributions).  Mobil contributes sufficient
funds to provide an allocation of Mobil's  Series B ESOP  Convertible  Preferred
Stock  (Mobil  ESOP  Convertible  Preferred  Stock)  equal  to 4% of  employees'
benefits  bearing  pay  (except  for (i)  Pasadena  Hourly  participants,  whose
allocation  percentage  is 2%,  and  (ii)  Films  division  participants,  whose
allocation  percentage  has  been  increased  from 4% to 5% for the  year  ended
January 31, 1998, and decreased to 4% for the year ended January 31, 1999), plus
additional  Mobil ESOP  Convertible  Preferred  Stock in lieu of preferred  cash
dividends on such stock.

401(k)  Account - This  includes  employee  pre-tax  contributions  and  Mobil's
contributions of 2% of base pay (3% for pre-January 1, 1969 employees).  SOI and
Pasadena Hourly participants are ineligible to receive Mobil  contributions.  An
employee can elect to receive a portion or all of Mobil's  contribution in cash.
The combined Mobil and employee  contributions to this account cannot exceed 15%
of the  employee's  eligible  compensation.  Federal  regulations  governing the
401(k)  Account  limit in certain cases the combined  Mobil and employee  401(k)
contributions to less than 15% of eligible compensation.



                                                         - 6 -

<PAGE>




               EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                      NOTES TO PLAN FINANCIAL STATEMENTS
                           JANUARY 31, 1997 and 1998


Note 1.  Description of the Plan - continued

Effective  January  1,  1999,  Mobil's  4%  contribution  rate to the ESOP  will
increase to 6% of benefits  bearing pay, and Mobil's  contribution to the 401(k)
Account will be discontinued,  except for pre-January 1, 1969 employees who will
continue to have 1% contributed  unless the employee elects to receive the 1% in
cash.

Vesting & other - Mobil's  contributions  to the  Savings  Account  and  related
investment  income  become vested upon  completion of five years of  employment.
Mobil's  contributions to the 401(k) account and all employee  contributions and
related earnings are immediately vested.

Effective  January  1,  1999,  participants  will (i) have the option to receive
dividends  from  Mobil  Common  Stock in the Plan in cash  without a  withdrawal
penalty, and (ii) receive additional contributions equal to 15% of the amount of
dividends they receive on Mobil Common Stock, subject to certain limitations.

The terms of the Plan are more fully described in the Summary Plan  Description,
which is furnished to each participant.

Note 2.  Administration of Plan Assets

The Plan is  administered by Mobil Oil  Corporation  acting through  fiduciaries
designated by its Board of Directors to serve at its discretion.  Merrill Lynch,
Pierce,  Fenner and Smith Inc. is the record-keeper for the Plan.  Merrill Lynch
Trust  Company  (Merrill  Lynch) is the trustee,  with the exception of the ESOP
portion of the Plan, of which Bankers Trust Company is the trustee.

Note 3.  Major Accounting Policies

Security  valuation - Mobil Common Stock is valued at the Plan's  average  sales
price  for the  day  (based  on the  New  York  Stock  Exchange),  on the day of
valuation or, lacking any sales on that day, at the most recent bid quotation.

Mobil's ESOP  Convertible  Preferred Stock units (1/100th of a share) are stated
at current value, which is the higher of the liquidation value or current market
value.  Liquidation value is the minimum price guaranteed by Mobil,  $38.875 per
unit.  Current  market  value is defined as the  average  sales  price for Mobil
Common Stock as defined in the previous paragraph.

Long-Term Fixed Income Funds and the Merrill Lynch Floating Rate Long-Term Fixed
Income Fund (LTFI)are stated at current value,  which  approximates  fair value,
representing the original cost, plus interest (based upon the crediting rates of
the underlying contracts) reduced by transfers out and withdrawals.

The Aim Charter Fund,  the Merrill  Lynch Global  Allocation  Fund,  the Merrill
Lynch Institutional Fund, the Franklin U.S. Government  Securities Fund, the MFS
Emerging  Growth Fund, the Templeton  Foreign Fund and the Templeton  Developing
Markets  Trust are  publicly  traded and valued at the closing sale price of the
last business day of the Plan year.

The Jennison Fund and the Merrill Lynch Equity Index Trust are stated at current
value, which approximates the fair value of the funds' underlying securities and
encompass dividends,  interest,  gains and losses and administration fees in the
values of each unit.



                                                              - 7 -

<PAGE>




               EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                      NOTES TO PLAN FINANCIAL STATEMENTS
                           JANUARY 31, 1997 and 1998


Note 3.  Major Accounting Policies - continued

Participant loans represent the outstanding  principal balances of the loans and
are valued at cost, which approximates current value.

Additional  descriptions of the investment  choices in the Plan are available to
the participants from Merrill Lynch.

Investment  income - Dividends  from Mobil  Common  Stock are accrued on the ex-
dividend date.

The minimum annual dividend on a unit of Mobil ESOP Convertible  Preferred Stock
accrues  on a monthly  basis,  and is set at $3.00 per  year.  If the  aggregate
declared  dividends on a share of Mobil Common Stock for the six months before a
semi-annual dividend on the Mobil ESOP Convertible  Preferred Stock exceed $3.00
per share,  the  semi-annual  dividend  on a unit of the Mobil ESOP  Convertible
Preferred Stock will be at least the same as such aggregate dividends on a share
of Mobil Common Stock.

All other  earnings are stated on an accrual basis.  Investment  income from all
sources is stated net of investment  management,  trustee, audit and other third
party  fees of  approximately  $2,427,000  and  $2,782,000  for the years  ended
January 31, 1997 and 1998, respectively.

Security  transactions  are  recorded  on  a  trade  date  basis.  Realized  and
unrealized gains and losses are based on an average cost method.

Forfeitures - Amounts forfeited  (non-vested Mobil contributions and accumulated
earnings  thereon)  under  the  Plan  are used to  reduce  Mobil  contributions.
Unapplied  forfeitures  at January 31 are  accounted  for as reductions in Mobil
contributions.

Reclassifications  - The  financial  statements  for the year ended  January 31,
1997, have been reclassified to conform to the 1998 presentation.

Use of estimates - The  preparation  of the  financial  statements in accordance
with generally  accepted  accounting  principles  requires Mobil to make certain
estimates and assumptions affecting amounts in the financial statements.  Actual
results could differ from these estimates and assumptions.

Note 4.  Employee Stock Ownership Plan (ESOP)

In November  1989,  the ESOP trust,  supported by a Mobil  guarantee,  privately
placed  $800,000,000 of floating  interest rate notes due November 22, 2004, and
used the proceeds to purchase 205,788 shares of Mobil ESOP Convertible Preferred
Stock at a price equal to liquidation  value, or $3,887.50 per share. Each share
is  convertible  into 100 shares of Mobil  Common  Stock and is  entitled to 100
votes.

On February 27, 1990, the ESOP trust issued and Mobil guaranteed $800,000,000 of
9.17% Sinking Fund Debentures due February 29, 2000,  pursuant to Rule 415 under
the  Securities  Act of 1933.  The ESOP  trust used the  proceeds  to retire the
floating interest rate notes due November 22, 2004.


                                                              - 8 -

<PAGE>




               EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                      NOTES TO PLAN FINANCIAL STATEMENTS
                           JANUARY 31, 1997 and 1998


Note 4.  Employee Stock Ownership Plan (ESOP) - continued

The ESOP trust has a shelf registration on file with the Securities and Exchange
Commission that would, as of January 31, 1998, permit the offer and sale of $115
million of debt securities,  guaranteed by Mobil,  pursuant to Rule 415. Through
January 31,  1998,  the ESOP trust issued and Mobil  guaranteed  an aggregate of
$185 million of medium-term notes under this shelf registration. The proceeds of
sale of these notes were used to retire identical  principal amounts of existing
debt, and the proceeds of the issue and sale of any other debt securities issued
and sold  under  this  shelf  registration  would be used for the same  purpose.
Interest on these  medium-term  notes is due  semi-annually.  A summary of these
medium-term notes is as follows:

     Date of                      Interest      Maturity
     Issuance        Amount         Rate          Date
     --------     ------------    --------      --------

     2/28/94      $ 25,000,000     6.220%        2/28/02
     8/31/94        15,000,000     7.550%        2/28/02
     2/28/95        30,000,000     8.225%        8/31/04
     8/31/96        25,000,000     6.700%        8/31/00
     8/31/96        15,000,000     6.625%        2/28/01
     2/28/97        25,000,000     6.250%        8/31/01
     2/28/97        10,000,000     6.300%        9/03/02
     9/02/97        40,000,000     6.375%        8/31/01
                  ------------
                  $185,000,000
                  ============

Principal and interest  payments on the debentures and medium term notes are due
semi-annually.   Fiscal  year  annual  principal   maturities  are  as  follows:
$115,800,000 in 1999;  $135,600,000 in 2000; $85,600,000 in 2001; $80,000,000 in
2002; $50,000,000 in 2003; and $30,000,000  thereafter.  Only unallocated assets
held in the ESOP trust are subject to recourse by creditors of the ESOP trust.

On March 2, 1998, the ESOP trust issued and Mobil  guaranteed  medium term notes
of $25,000,000 at 5.875%,  due September 3, 2002, and $20,000,000 at 5.900%, due
February 28, 2003.

The ESOP trust uses  dividends on the Mobil ESOP  Convertible  Preferred  Stock,
together with  contributions  from Mobil,  to repay the ESOP debt (principal and
interest).  The amount of ESOP debt repaid each Plan year results in the release
of  shares  of  Mobil  ESOP  Convertible  Preferred  Stock to be  available  for
allocation  to Plan  participants'  accounts.  Mobil  contributes  semi-annually
sufficient  funds to ensure that each  participant's  account is  credited  with
Mobil ESOP Convertible Preferred Stock as discussed in Note 1.

Plan  participants  earned  780,876  and 623,668  pay-based  units of Mobil ESOP
Convertible  Preferred Stock,  plus credit for fractional  units, for the fiscal
years ended January 31, 1997 and 1998,  respectively.  The aggregate fair values
of these units were  $44,475,803  in 1997 and  $43,921,110 in 1998. In addition,
Plan participants earn units of Mobil ESOP Convertible  Preferred Stock equal to
the value of the preferred dividends on units allocated to participant accounts.
The units of Mobil ESOP  Convertible  Preferred  Stock earned by dividends  were
429,594 with a fair value of  $24,513,138 in 1997, and 354,055 with a fair value
of $25,109,583 in 1998.


                                                              - 9 -

<PAGE>




               EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                      NOTES TO PLAN FINANCIAL STATEMENTS
                         JANUARY 31, 1997 and 1998


Note 4.  Employee Stock Ownership Plan (ESOP) - continued

As of January 31, 1997 and 1998,  the Plan held  9,270,402 and 8,292,678  units,
respectively,  of Mobil ESOP Convertible  Preferred Stock,  which have yet to be
earned  by  employees.   The  current   values  of  these  unearned  units  were
$608,370,131 in 1997 and $568,048,443 in 1998. Net assets available for benefits
at January 31, 1997 and 1998, included unrealized gains on the unallocated units
of $247,983,254 and $245,670,586, respectively, since the ESOP's inception.

As a result of the  two-for-one  split of Mobil  Common  Stock in May 1997,  the
number of  outstanding  shares of Mobil  ESOP  Convertible  Preferred  Stock was
doubled and the dividend rate and liquidation price were halved.  All references
in this  report  to the  number  of  shares  of such  stock,  dividend  rate and
liquidation price reflect, in some cases as a result of retroactive adjustments,
these stock split- related changes.

Note 5.  Contributions and Distributions

Mobil's  contributions  are net of  forfeitures of $650,123 and $229,409 for the
years ended January 31, 1997 and 1998, respectively.

Transfers in include  participant-initiated  rollovers of certain  distributions
from other tax-qualified plans into the Savings Account, and the merger of other
Mobil plans into the Plan (see Note 1).

The Plan provides for the payment of vested  benefits upon  termination,  death,
disability or retirement.

Note 6.  Participant Loans

The Plan allows participants to borrow against their accounts in the trust. Loan
interest  rates  are  reviewed  quarterly  and  determined  for  new  loans,  if
appropriate,  based on the "Bank Prime Loan" rate for the last  business  day of
the second preceding calendar month, as published in Federal Reserve Statistical
Release H.15. The term of loans may be any monthly  increment  between 12 and 60
months.

The maximum  loan amount  permitted  is the lesser of (i)  one-half  the current
value of the vested portion of the  participant's  account less any  outstanding
loan balance,  or (ii) $50,000 less the maximum  outstanding loan balance in the
preceding twelve months.

The Plan permits  employees  whose  employment  with Mobil was  terminated  as a
result of the sale of operations in Nichols,  Florida,  the sale of the Consumer
Products Division, Mobil Natural Gas Inc.'s asset sale and related joint venture
and Mobil's  entering  into the Aera Energy joint  venture to continue  repaying
their outstanding loans in accordance with the existing repayment schedules.

Note 7.  Plan Investments

At January 31, 1997 and 1998,  the percentage of the Plan's net assets that were
investments in or receivables from Mobil was 66% and 65%, respectively.



                                                             - 10 -

<PAGE>




               EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                      NOTES TO PLAN FINANCIAL STATEMENTS
                           JANUARY 31, 1997 and 1998


Note 7.  Plan Investments - continued

Investments in the Plan as of January 31, 1997 were as follows ($ millions):

                                                            Current
                                                  Cost       Value
                                                --------    --------
  Mobil Common Stock..........................   $  917      $1,975
  Mobil ESOP Convertible Preferred Stock......      683       1,152
  Merrill Lynch Floating Rate Long-Term
    Fixed Income Fund.........................      800         800
  Jennison Equity Fund........................      359         710
  Other lower risk funds - less than 5% of Plan net assets:
    Merrill Lynch Institutional Fund..........      147         147
    Merrill Lynch Global Allocation Fund......       77          82
    Merrill Lynch Equity Index Trust..........       47          60
    Franklin U.S. Government Securities Fund..       56          57
    AIM Charter Fund..........................       49          57
  Other higher risk funds - less than 5% of Plan net assets:
    MFS Emerging Growth Fund..................       99         113
    Templeton Foreign Fund....................       50          53
    Templeton Developing Markets Trust........       31          35
  Participant Loans...........................       87          87
                                                 ------      ------
                                                 $3,402      $5,328
                                                 ======      ======

Investments in the Plan as of January 31, 1998 were as follows ($ millions):

                                                            Current
                                                  Cost       Value
                                                --------    --------
  Mobil Common Stock..........................   $1,086      $2,093
  Mobil ESOP Convertible Preferred Stock......      663       1,168
  Merrill Lynch Floating Rate Long-Term
    Fixed Income Fund.........................      699         699
  Jennison Equity Fund........................      371         856
  Other lower risk funds - less than 5% of Plan net assets:
    Merrill Lynch Institutional Fund..........      114         114
    Merrill Lynch Global Allocation Fund......       82          84
    Merrill Lynch Equity Index Trust..........       68          94
    Franklin U.S. Government Securities Fund..       70          71
    AIM Charter Fund..........................       58          66
  Other higher risk funds - less than 5% of Plan net assets:
    MFS Emerging Growth Fund..................      100         126
    Templeton Foreign Fund....................       63          61
    Templeton Developing Markets Trust........       42          33
  Participant Loans...........................       82          82
                                                 ------      ------
                                                 $3,498      $5,547
                                                 ======      ======



                                                             - 11 -

<PAGE>




               EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                      NOTES TO PLAN FINANCIAL STATEMENTS
                           JANUARY 31, 1997 and 1998


Note 7.  Plan Investments - continued

The  Plan's  investment  in Mobil  Common  Stock at  January  31,  1997 and 1998
represents 3.8% and 3.9% of the outstanding shares, respectively.

The average crediting interest rate of the Merrill Lynch Floating Rate Long-Term
Fixed  Income  Fund for the years  ended  January 31, 1997 and 1998 was 6.5% for
both years. The annualized  crediting interest rate at January 31, 1997 and 1998
was also 6.5% for both years.  Crediting  rates fluctuate with the activities of
the underlying contracts. This investment choice has no fixed term nor a minimum
crediting interest rate in that context.

Note 8.  Tax Status

On January 9, 1996, the Internal Revenue Service (IRS) determined that the Plan,
as amended to include the ESOP,  continued to be a qualified  plan under Section
401(a) of the Internal Revenue Code (the Code),  that the ESOP portion qualifies
as an employee stock  ownership  plan under section  4975(e)(7) of the Code, and
that the Trust  thereunder  (the Trust) is exempt from Federal  income tax under
Section 501(a) of the Code.

On February  10, 1998,  Mobil  submitted  an  application  to the IRS seeking an
updated determination of the qualified status of the plan, covering Plan changes
made since 1996.

Note 9.  Plan Termination

While Mobil has not  expressed an intent to terminate  the Plan, it may do so at
any time,  subject to the provisions of the Employee  Retirement Income Security
Act (ERISA).  In the event the Plan is terminated,  all participants will become
fully  vested  in  their  accounts  and the net  assets  of the  Plan  shall  be
distributed among the participants in accordance with ERISA.




                                                             - 12 -

<PAGE>

<TABLE>
<CAPTION>


                            SUPPLEMENTAL INFORMATION
                 EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
           ITEM 27a - SCHEDULE OF ASSETS HELD FOR INVESTMENT PURPOSES
                                JANUARY 31, 1998

<S>                                        <C>                                   <C>        <C>                                 

                                           Description of Investment,                       CURRENT
Identity of Issue, Borrower,               Including Maturity Date, Rate of      COST        VALUE
  Lessor or Similar Party                  Interest, Par or Maturity Value      (000's)     (000's)
- ----------------------------------------------------------------------------------------------------
Corporate Stocks:
  Mobil Common Stock*                      30,551,202 shares                 $1,086,361  $2,092,757
  Mobil ESOP Convertible
    Preferred Stock*                          170,520 shares                    662,898   1,168,064

Registered Investment Companies:
  Merrill Lynch Institutional Fund*       114,175,494 shares                    114,175     114,175
  Massachusetts Financial Services Company
    MFS Emerging Growth Fund                3,380,831 shares                    100,327     125,868
  Merrill Lynch Global Allocation Fund*     5,812,812 shares                     81,681      83,588
  Franklin Custodian Funds, Inc. Franklin
    U.S. Government Securities Fund        10,262,678 shares                     69,687      71,326
  AIM Charter Fund                          5,345,718 shares                     58,323      66,233
  Franklin Templeton Group Templeton
    Foreign Fund                            6,148,205 shares                     62,773      61,421
  Franklin Templeton Group Templeton
    Developing Markets Trust                2,776,279 shares                     41,801      32,761

Common Collective Trust:
  Merrill Lynch Equity Index Trust*         1,420,030 shares                     67,915      93,848

Other investments:
  Jennison Associates Capital Corporation
    Jennison Equity Fund                   13,207,361 units                     370,624     855,838
  Merrill Lynch Floating Rate
    Long-Term Fixed Income Fund*          699,474,232 shares                    699,474     699,474

Participant loans, 6.0% to 9.0% interest rate range*                             81,834      81,834
                                                                             ----------  ----------
                                                                             $3,497,873  $5,547,187
                                                                             ==========  ==========

*  Party-in-interest as defined by ERISA


                                                             - 13 -
</TABLE>

<PAGE>

<TABLE>
<CAPTION>


                            SUPPLEMENTAL INFORMATION
                 EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION
                 ITEM 27d - SCHEDULE OF REPORTABLE TRANSACTIONS
                           YEAR ENDED JANUARY 31, 1998

<S>        <C>                     <C>        <C>      <C>      <C>         <C>       <C>           <C>
                                                                Expense               Current
                                                                Incurred              Value at      Net
Identity                           Purchase   Selling  Lease      With      Cost of   Transaction  Gain
of Party                           Price      Price    Rental  Transaction   Asset    Date        (Loss)
Involved    Description of Asset   (000's)    (000's)  (000's)   (000's)    (000's)   (000's)     (000's)
- ----------------------------------------------------------------------------------------------------------
Series of Transactions (Category iii)

Mobil*        Mobil Common Stock
              1,105 Purchases      $429,416                       $141     $429,557
              1,089 Sales                    $307,822               94      222,189   $307,728    $85,539

Merrill       Merrill Lynch Floating
Lynch*        Rate LTFI
              1,054 Purchases       388,016                                 388,016
              986 Sales                       487,861                       487,861    487,861          -



* Party-in-interest as defined by ERISA
There were no category (I), (ii) or (iv) reportable  transactions for the fiscal
year.

</TABLE>

                                                             - 14 -

<PAGE>




                                    SIGNATURE


Pursuant to the  requirements of the Securities  Exchange Act of 1934, Mobil Oil
Corporation,  the  administrator  of the  Employees  Savings  Plan of Mobil  Oil
Corporation,  has duly caused  this Annual  Report to be signed on its behalf by
the undersigned hereunto duly authorized.



EMPLOYEES SAVINGS PLAN OF MOBIL OIL CORPORATION


                                   MOBIL OIL CORPORATION





BY                                 /s/ GORDON G. GARNEY
NAME AND TITLE                     Gordon G. Garney, Senior
                                   Assistant Secretary
DATE                               May 13, 1998

                                                             - 15 -

<PAGE>




                                EXHIBIT INDEX


EXHIBIT                                                 SUBMISSION MEDIA


23. Consent of Ernst & Young LLP,                       Electronic
    Independent Auditors,
    dated May 6, 1998.

                                                             - 16 -

<PAGE>


                                 SIGNATURE

                                 EXHIBIT 23

             CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS


We consent to the incorporation by reference in the Registration Statements Form
S-8 (Nos 33-18130 and  333-16819)  pertaining  to the Employees  Savings Plan of
Mobil Oil  Corporation,  Form S-3 (No  33-34133-01) of the Mobil Oil Corporation
Employee  Stock  Ownership  Plan  Trust  for the  registration  of  $300,000,000
principal amount of debt securities  guaranteed by Mobil  Corporation and in the
related  Prospectuses,  of our report dated April 15, 1998,  with respect to the
financial statements and supplemental schedules of the Employees Savings Plan of
Mobil Oil Corporation  included in this Annual Report (Form 11-K) for the fiscal
year ended January 31, 1998.









                                                /s/ ERNST & YOUNG LLP
Fairfax, Virginia                               Ernst & Young LLP
May 6, 1998


                                                             - 17 -

<PAGE>



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