North America Crude Oil Marketing - September 2006 Summary California Bulletins 06-CA161 to 06-CA180, 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	CA161 09/01	CA162 09/05	CA163 09/06	CA164 09/07	CA165 09/08	CA166 09/11	CA167 09/12	CA168 09/13	CA169 09/14	CA170 09/15	CA171 09/18
Buena Vista Hills		63.15	62.55	61.35	61.15	60.15	59.50	57.65	57.85	57.10	57.20	57.65
Coalinga		58.35	57.75	56.55	56.35	55.35	54.70	52.85	53.05	52.30	52.40	52.85
Huntington Beach		59.70	59.10	57.90	57.70	56.70	56.05	54.20	54.40	53.65	53.75	54.20
Kettleman Hills		66.40	65.80	64.60	64.40	63.40	62.75	60.90	61.10	60.35	60.45	60.90
Lost Hills		65.00	64.40	63.20	63.00	62.00	61.35	59.50	59.70	58.95	59.05	59.50
McKittrick		57.65	57.05	55.85	55.65	54.65	54.00	52.15	52.35	51.60	51.70	52.15
Midway Sunset		57.65	57.05	55.85	55.65	54.65	54.00	52.15	52.35	51.60	51.70	52.15
Pt Arguello (onshore)		54.70	54.10	52.90	52.70	51.70	51.05	49.20	49.40	48.65	48.75	49.20
San Ardo		54.60	54.00	52.80	52.60	51.60	50.95	49.10	49.30	48.55	48.65	49.10
Seal Beach		64.10	63.50	62.30	62.10	61.10	60.45	58.60	58.80	58.05	58.15	58.60

California	API	CA172 09/19	CA173 09/20	CA174 09/21	CA175 09/22	CA176 09/25	CA177 09/26	CA178 09/27	CA179 09/28	CA180 09/29		Mthly Avg
Buena Vista Hills		55.50	54.30	54.90	53.90	54.55	54.10	56.30	56.35	56.75		58.0217
Coalinga		50.70	49.50	50.10	49.10	49.75	49.30	51.50	51.55	51.95		53.2217
Huntington Beach		52.05	50.85	51.45	50.45	51.10	50.65	52.85	52.90	53.30		54.5717
Kettleman Hills		58.75	57.55	58.15	57.15	57.80	57.35	59.55	59.60	60.00		61.2717
Lost Hills		57.35	56.15	56.75	55.75	56.40	55.95	58.15	58.20	58.60		59.8717
McKittrick		50.00	48.80	49.40	48.40	49.05	48.60	50.80	50.85	51.25		52.5217
Midway Sunset		50.00	48.80	49.40	48.40	49.05	48.60	50.80	50.85	51.25		52.5217
Pt Arguello (onshore)		47.05	45.85	46.45	45.45	46.10	45.65	47.85	47.90	48.30		49.5717
San Ardo		46.95	45.75	46.35	45.35	46.00	45.55	47.75	47.80	48.20		49.4717
Seal Beach		56.45	55.25	55.85	54.85	55.50	55.05	57.25	57.30	57.70		58.9717

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.