North America Crude Oil Marketing - May 2007 Summary California Bulletins 07-CA79 to 07-CA100, with Monthly Averages

Chevron has changed its posted prices as shown below: Effective 7:00 AM on the above listed effective date, subject to change without notice, Chevron will pay the following prices per barrel for crude oil and condensate delivered for its account into the custody of its authorized carrier or receiving agent. Prices are subject to deduction for transportation and other charges where applicable. Prices for oil apply to quantities measured by approved automatic custody transfer facilities or 100% tank table with customary adjustment of volume and gravity for temperature and full deduction for sediment and water.

* Prices are subject to a Gravity Adjustment Scale

California	API	CA79 05/01	CA80 05/02	CA81 05/03	CA82 05/04	CA83 05/07	CA84 05/08	CA85 05/09	CA86 05/10	CA87 05/11	CA88 05/14	CA89 05/15	CA90 05/16
Buena Vista Hills		60.40	59.70	59.20	57.95	57.50	58.30	57.60	57.85	58.45	58.55	59.30	58.65
Coalinga		55.15	54.45	53.95	52.70	52.25	53.05	52.35	52.60	53.20	53.30	54.05	53.40
Huntington Beach		56.65	55.95	55.45	54.20	53.75	54.55	53.85	54.10	54.70	54.80	55.55	54.90
Kettleman Hills		63.80	63.10	62.60	61.35	60.90	61.70	61.00	61.25	61.85	61.95	62.70	62.05
Lost Hills		62.10	61.40	60.90	59.65	59.20	60.00	59.30	59.55	60.15	60.25	61.00	60.35
McKittrick		54.40	53.70	53.20	51.95	51.50	52.30	51.60	51.85	52.45	52.55	53.30	52.65
Midway Sunset		54.40	53.70	53.20	51.95	51.50	52.30	51.60	51.85	52.45	52.55	53.30	52.65
Seal Beach		61.40	60.70	60.20	58.95	58.50	59.30	58.60	58.85	59.45	59.55	60.30	59.65

California	API	CA91 05/17	CA92 05/18	CA93 05/21	CA94 05/22	CA95 05/23	CA96 05/24	CA97 05/25	CA98 05/29	CA99 05/30	CA100 05/31		Mthly Avg
Buena Vista Hills		60.95	61.15	62.50	61.20	62.00	60.60	61.70	59.65	60.00	60.50		59.8032
Coalinga		55.70	55.90	57.25	55.95	56.75	55.35	56.45	54.40	54.75	55.25		54.5532
Huntington Beach		57.20	57.40	58.75	57.45	58.25	56.85	57.95	55.90	56.25	56.75		56.0532
Kettleman Hills		64.35	64.55	65.90	64.60	65.40	64.00	65.10	63.05	63.40	63.90		63.2032
Lost Hills		62.65	62.85	64.20	62.90	63.70	62.30	63.40	61.35	61.70	62.20		61.5032
McKittrick		54.95	55.15	56.50	55.20	56.00	54.60	55.70	53.65	54.00	54.50		53.8032
Midway Sunset		54.95	55.15	56.50	55.20	56.00	54.60	55.70	53.65	54.00	54.50		53.8032
Seal Beach		61.95	62.15	63.50	62.20	63.00	61.60	62.70	60.65	61.00	61.50		60.8032

Note: Prices in $/bbl

Measurement The prices are based upon computation of quantities by mutually acceptable automatic measuring equipment in accordance with the latest ASTM Standards and API Manual of Petroleum Measurement Standards (MPMS) generally accepted in the petroleum industry with deductions for full sediment, water and other impurities.