Washington, D.C. 20549

  OMB Number: 3235-0287
  Expires: January 31, 2005
[  ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility
Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

  Estimated average burden
  hours per response....   0.5
(Print or Type Responses)
1. Name and Address of Reporting Person* 2. Issuer Name and Ticker or Trading Symbol 6. Relationship of Reporting Person(s) to Issuer
              (Check all applicable)
Hirl, J. Roger Occidental Petroleum Corporation    

OXY            Director            10% Owner
(Last)                                (First)                          (Middle)
  X       Officer (give title            Other (specify
Occidental Chemical Corporation 3. I.R.S. Identification Number 4. Statement for Month/Day/Year                  below)                below)
5005 LBJ Freeway of Reporting Person, if an

entity (voluntary) 04/30/2003
Executive Vice President
5. If Amendment, Date of Original
Dallas, Texas 75244 (Month/Year)

7. Individual or Joint/Group Filing (Check Applicable Line)
       (City)                               (State)                           (Zip)   X       Form filed by One Reporting Person
           Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security 2. Transaction 2a. Deemed 3. Transaction Code 4. Securities Acquired (A) or 5. Amount of 6. Ownership 7. Nature of
(Instr. 3) Date Execution Disposed of (D) Securities Form: Indirect
Date, if any (Instr. 8) Beneficially Direct (D) or Beneficial
(Month/Day/ (Instr. 3, 4 and 5) Owned at End Indirect (I) Ownership
Year) (Month/Day/

of Month
Year) Code V Amount (A) or (D) Price (Instr. 3 and 4) (Instr. 4) (Instr. 4)

Common Stock     04/30/2003      S 5,000 D $29.90 90,886 D








Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(b)(v).


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FORM 4 (continued)                               Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned

(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative 2. Conver- 3. Trans- 3a. Deemed 4. Transac- 5. Number of Deriv- 6. Date Exer- 7. Title and Amount of 8. Price 9. Number 10. Owner- 11. Na-
Security sion or action Execu- tion Code ative Securities cisable and Ex- Underlying of of Der- ship ture
(Instr. 3) Exercise Date tion (Instr. 8) Acquired (A) or piration Date Securities Deriv- ivative Form of In-
Price of Date, Disposed of (D) (Month/Day/ (Instr. 3 and 4) ative Secur- of De- direct
Deriv- (Month/ if any (Instr. 3, 4 and 5) Year) Secur- ities rivative Bene-
ative Day/ ity Bene- Secur- ficial
Security Year) (Month/

ficially ity: Own-
Day/ (Instr. Owned Direct ership
Year)     Date     Expira- Amount or 5) at End (D) or (Instr. 4)
Code V (A) (D)     Exer-     tion Title Number of of Indi-
    cisable     Date Shares Month rect (I)
(Instr. 4) (Instr. 4)









Explanation of Responses:
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations.
See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed.
If space is insufficient, see Instruction 6 for procedure.
**Signature of Reporting Person
May 1, 2003
Potential persons who are to respond to the collection of information contained in this form are not
required to respond unless the form displays a currently valid OMB control number.
Christel H. Pauli, Attorney-in-Fact
for J. Roger Hirl


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