North America Crude Oil Marketing - March 2006 Summary California Bulletins 06-CA37 to 06-CA58, 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	CA37 03/01	CA38 03/02	CA39 03/03	CA40 03/06	CA41 03/07	CA42 03/08	CA43 03/09	CA44 03/10	CA45 03/13	CA46 03/14	CA47 03/15	CA48 03/16
Buena Vista Hills		54.75	56.10	56.40	55.15	54.30	52.75	53.20	52.75	54.55	55.90	55.00	56.40
Coalinga		50.25	51.60	51.90	50.65	49.80	48.25	48.70	48.25	50.05	51.40	50.50	51.90
Huntington Beach		51.50	52.85	53.15	51.90	51.05	49.50	49.95	49.50	51.30	52.65	51.75	53.15
Kettleman Hills		57.85	59.20	59.50	58.25	57.40	55.85	56.30	55.85	57.65	59.00	58.10	59.50
Lost Hills		56.50	57.85	58.15	56.90	56.05	54.50	54.95	54.50	56.30	57.65	56.75	58.15
McKittrick		49.55	50.90	51.20	49.95	49.10	47.55	48.00	47.55	49.35	50.70	49.80	51.20
Midway Sunset		49.55	50.90	51.20	49.95	49.10	47.55	48.00	47.55	49.35	50.70	49.80	51.20
Pt Arguello (onshore)		46.70	48.05	48.35	47.10	46.25	44.70	45.15	44.70	46.50	47.85	46.95	48.35
San Ardo		46.60	47.95	48.25	47.00	46.15	44.60	45.05	44.60	46.40	47.75	46.85	48.25
Seal Beach		55.65	57.00	57.30	56.05	55.20	53.65	54.10	53.65	55.45	56.80	55.90	57.30

California	API	CA49 03/17	CA50 03/20	CA51 03/21	CA52 03/22	CA53 03/23	CA54 03/24	CA55 03/28	CA56 03/29	CA57 03/30	CA58 03/31		Mthly Avg
Buena Vista Hills		55.60	53.30	53.45	53.65	56.05	56.90	58.85	59.25	60.00	59.55		55.6145
Coalinga		51.10	48.80	48.95	49.15	51.55	52.40	54.35	54.75	55.50	55.05		51.1145
Huntington Beach		52.35	50.05	50.20	50.40	52.80	53.65	55.60	56.00	56.75	56.30		52.3645
Kettleman Hills		58.70	56.40	56.55	56.75	59.15	60.00	61.95	62.35	63.10	62.65		58.7145
Lost Hills		57.35	55.05	55.20	55.40	57.80	58.65	60.60	61.00	61.75	61.30		57.3645
McKittrick		50.40	48.10	48.25	48.45	50.85	51.70	53.65	54.05	54.80	54.35		50.4145
Midway Sunset		50.40	48.10	48.25	48.45	50.85	51.70	53.65	54.05	54.80	54.35		50.4145
Pt Arguello (onshore)		47.55	45.25	45.40	45.60	48.00	48.85	50.80	51.20	51.95	51.50		47.5645
San Ardo		47.45	45.15	45.30	45.50	47.90	48.75	50.70	51.10	51.85	51.40		47.4645
Seal Beach		56.50	54.20	54.35	54.55	56.95	57.80	59.75	60.15	60.90	60.45		56.5145

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.