North America Crude Oil Marketing - December 2005 Summary California Bulletins 05-CA208 to 05-CA226, 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	CA208 12/01	CA209 12/02	CA210 12/05	CA211 12/07	CA212 12/08	CA213 12/09	CA214 12/12	CA215 12/14	CA216 12/15	CA217 12/16
Buena Vista Hills		52.45	53.25	53.85	53.10	54.50	53.25	55.10	54.65	53.75	51.80
Coalinga		48.00	48.80	49.40	48.65	50.05	48.80	50.65	50.20	49.30	47.35
Huntington Beach		49.30	50.10	50.70	49.95	51.35	50.10	51.95	51.50	50.60	48.60
Kettleman Hills		55.45	56.25	56.85	56.10	57.50	56.25	58.10	57.65	56.75	54.85
Lost Hills		54.15	54.95	55.55	54.80	56.20	54.95	56.80	56.35	55.45	53.55
McKittrick		47.35	48.15	48.75	48.00	49.40	48.15	50.00	49.55	48.65	46.65
Midway Sunset		47.35	48.15	48.75	48.00	49.40	48.15	50.00	49.55	48.65	46.65
Pt Arguello (onshore)		44.50	45.30	45.90	45.15	46.55	45.30	47.15	46.70	45.80	43.80
San Ardo		44.40	45.20	45.80	45.05	46.45	45.20	47.05	46.60	45.70	43.70
Seal Beach		53.30	54.10	54.70	53.95	55.35	54.10	55.95	55.50	54.60	52.70

California	API	CA218 12/19	CA219 12/20	CA220 12/21	CA221 12/22	CA222 12/23	CA223 12/27	CA224 12/28	CA225 12/29	CA226 12/30	Mthly Avg
Buena Vista Hills		51.10	51.70	52.10	51.75	51.95	51.70	53.40	53.95	54.65	53.0339
Coalinga		46.65	47.25	47.65	47.30	47.50	47.25	48.95	49.50	50.20	48.5839
Huntington Beach		47.90	48.50	48.90	48.55	48.75	48.50	50.20	50.75	51.45	49.8581
Kettleman Hills		54.15	54.75	55.15	54.80	55.00	54.75	56.45	57.00	57.70	56.0597
Lost Hills		52.85	53.45	53.85	53.50	53.70	53.45	55.15	55.70	56.40	54.7597
McKittrick		45.95	46.55	46.95	46.60	46.80	46.55	48.25	48.80	49.50	47.9081
Midway Sunset		45.95	46.55	46.95	46.60	46.80	46.55	48.25	48.80	49.50	47.9081
Pt Arguello (onshore)		43.10	43.70	44.10	43.75	43.95	43.70	45.40	45.95	46.65	45.0581
San Ardo		43.00	43.60	44.00	43.65	43.85	43.60	45.30	45.85	46.55	44.9581
Seal Beach		52.00	52.60	53.00	52.65	52.85	52.60	54.30	54.85	55.55	53.9097

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.