North America Crude Oil Marketing - September 2005 Summary California Bulletins 05-CA149 to 05-CA169, 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	CA149 09/01	CA150 09/02	CA151 09/06	CA152 09/07	CA153 09/08	CA154 09/09	CA155 09/12	CA156 09/13	CA157 09/14	CA158 09/15	CA159 09/16
Buena Vista Hills		63.85	61.95	60.35	58.75	58.90	58.50	57.75	57.50	59.50	59.15	57.40
Coalinga		59.50	57.60	56.00	54.40	54.55	54.15	53.40	53.15	55.15	54.80	53.05
Huntington Beach		60.75	58.85	57.25	55.65	55.80	55.40	54.65	54.40	56.40	56.05	54.30
Kettleman Hills		66.80	64.90	63.30	61.70	61.85	61.45	60.70	60.45	62.45	62.10	60.35
Lost Hills		65.55	63.65	62.05	60.45	60.60	60.20	59.45	59.20	61.20	60.85	59.10
McKittrick		58.85	56.95	55.35	53.75	53.90	53.50	52.75	52.50	54.50	54.15	52.40
Midway Sunset		58.85	56.95	55.35	53.75	53.90	53.50	52.75	52.50	54.50	54.15	52.40
Pt Arguello (onshore)		55.25	53.35	51.75	50.15	50.30	49.90	49.15	48.90	50.90	50.55	48.80
San Ardo		55.95	54.05	52.45	50.85	51.00	50.60	49.85	49.60	51.60	51.25	49.50
Seal Beach		64.70	62.80	61.20	59.60	59.75	59.35	58.60	58.35	60.35	60.00	58.25

California	API	CA160 09/19	CA161 09/20	CA162 09/21	CA163 09/22	CA164 09/23	CA165 09/26	CA166 09/27	CA167 09/28	CA168 09/29	CA169 09/30	Mthly Avg
Buena Vista Hills		61.80	60.65	61.30	61.00	58.70	60.30	59.55	60.80	61.30	60.75	59.8267
Coalinga		57.45	56.30	56.90	56.60	54.30	55.90	55.15	56.40	56.90	56.35	55.4600
Huntington Beach		58.70	57.55	58.15	57.85	55.55	57.15	56.40	57.65	58.15	57.60	56.7100
Kettleman Hills		64.75	63.60	64.30	64.00	61.70	63.30	62.55	63.80	64.30	63.75	62.7933
Lost Hills		63.50	62.35	63.00	62.70	60.40	62.00	61.25	62.50	63.00	62.45	61.5267
McKittrick		56.80	55.65	56.25	55.95	53.65	55.25	54.50	55.75	56.25	55.70	54.8100
Midway Sunset		56.80	55.65	56.25	55.95	53.65	55.25	54.50	55.75	56.25	55.70	54.8100
Pt Arguello (onshore)		53.20	52.05	52.65	52.35	50.55	52.40	51.65	52.90	53.40	52.85	51.3850
San Ardo		53.90	52.75	53.30	53.00	50.70	52.30	51.55	52.80	53.30	52.75	51.8933
Seal Beach		62.65	61.50	62.15	61.85	59.55	61.15	60.40	61.65	62.15	61.60	60.6767

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.