North America Crude Oil Marketing - August 2005 Summary California Bulletins 05-CA127 to 05-CA148, 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	CA127 08/01	CA128 08/02	CA129 08/03	CA130 08/04	CA131 08/05	CA132 08/08	CA133 08/09	CA134 08/10	CA135 08/11	CA136 08/12	CA137 08/15	CA138 08/16
Buena Vista Hills		55.75	56.05	55.05	55.60	56.50	58.15	57.30	59.10	60.05	61.10	60.50	60.30
Coalinga		51.40	51.70	50.70	51.25	52.15	53.80	52.95	54.75	55.70	56.75	56.15	55.95
Huntington Beach		52.65	52.95	51.95	52.50	53.40	55.05	54.20	56.00	56.95	58.00	57.40	57.20
Kettleman Hills		58.70	59.00	58.00	58.55	59.45	61.10	60.25	62.05	63.00	64.05	63.45	63.25
Lost Hills		57.45	57.75	56.75	57.30	58.20	59.85	59.00	60.80	61.75	62.80	62.20	62.00
McKittrick		50.75	51.05	50.05	50.60	51.50	53.15	52.30	54.10	55.05	56.10	55.50	55.30
Midway Sunset		50.75	51.05	50.05	50.60	51.50	53.15	52.30	54.10	55.05	56.10	55.50	55.30
Pt Arguello (onshore)		47.15	47.45	46.45	47.00	47.90	49.55	48.70	50.50	51.45	52.50	51.90	51.70
San Ardo		47.85	48.15	47.15	47.70	48.60	50.25	49.40	51.20	52.15	53.20	52.60	52.40
Seal Beach		56.60	56.90	55.90	56.45	57.35	59.00	58.15	59.95	60.90	61.95	61.35	61.15

California	API	CA139 08/17	CA140 08/19	CA141 08/22	CA142 08/23	CA143 08/24	CA144 08/25	CA145 08/26	CA146 08/29	CA147 08/30	CA148 08/31		Mthly Avg
Buena Vista Hills		57.50	59.65	59.75	59.65	61.35	61.65	60.35	61.45	64.15	63.30		59.2565
Coalinga		53.15	55.30	55.40	55.30	57.00	57.30	56.00	57.10	59.80	58.95		54.9065
Huntington Beach		54.40	56.55	56.65	56.55	58.25	58.55	57.25	58.35	61.05	60.20		56.1565
Kettleman Hills		60.45	62.60	62.70	62.60	64.30	64.60	63.30	64.40	67.10	66.25		62.2065
Lost Hills		59.20	61.35	61.45	61.35	63.05	63.35	62.05	63.15	65.85	65.00		60.9565
McKittrick		52.50	54.65	54.75	54.65	56.35	56.65	55.35	56.45	59.15	58.30		54.2565
Midway Sunset		52.50	54.65	54.75	54.65	56.35	56.65	55.35	56.45	59.15	58.30		54.2565
Pt Arguello (onshore)		48.90	51.05	51.15	51.05	52.75	53.05	51.75	52.85	55.55	54.70		50.6565
San Ardo		49.60	51.75	51.85	51.75	53.45	53.75	52.45	53.55	56.25	55.40		51.3565
Seal Beach		58.35	60.50	60.60	60.50	62.20	62.50	61.20	62.30	65.00	64.15		60.1065

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.