North America Crude Oil Marketing - April 2005 Summary California Bulletins 05-CA49 to 05-CA66, 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	CA49 04/01	CA50 04/04	CA51 04/05	CA52 04/06	CA53 04/07	CA54 04/08	CA55 04/11	CA56 04/12	CA57 04/13	CA58 04/14
Buena Vista Hills		48.90	48.65	47.65	47.45	45.70	45.00	45.40	43.60	42.00	42.90
Coalinga		44.45	44.20	43.20	43.00	41.25	40.55	40.95	39.15	37.55	38.45
Huntington Beach		45.70	45.45	44.45	44.25	42.50	41.80	42.20	40.40	38.80	39.70
Kettleman Hills		51.90	51.65	50.65	50.45	48.70	48.00	48.40	46.60	45.00	45.90
Lost Hills		50.60	50.35	49.35	49.15	47.40	46.70	47.10	45.30	43.70	44.60
McKittrick		43.80	43.55	42.55	42.35	40.60	39.90	40.30	38.50	36.90	37.80
Midway Sunset		43.80	43.55	42.55	42.35	40.60	39.90	40.30	38.50	36.90	37.80
Pt Arguello (onshore)		40.00	39.75	38.75	38.55	36.80	36.10	36.50	34.70	33.10	34.00
San Ardo		41.40	41.15	40.15	39.95	38.20	37.50	37.90	36.10	34.50	35.40
Seal Beach		49.75	49.50	48.50	48.30	46.55	45.85	46.25	44.45	42.85	43.75

California	API	CA59 04/15	CA60 04/19	CA61 04/20	CA62 04/22	CA63 04/25	CA64 04/26	CA65 04/27	CA66 04/29		Mthly Avg
Buena Vista Hills		42.30	44.10	44.40	46.70	46.10	45.90	43.70	41.80		45.0083
Coalinga		37.85	39.65	39.95	42.25	41.65	41.45	39.25	37.35		40.5583
Huntington Beach		39.10	40.90	41.20	43.50	42.90	42.70	40.50	38.60		41.8083
Kettleman Hills		45.30	47.10	47.40	49.70	49.10	48.90	46.70	44.80		48.0083
Lost Hills		44.00	45.80	46.10	48.40	47.80	47.60	45.40	43.50		46.7083
McKittrick		37.20	39.00	39.30	41.60	41.00	40.80	38.60	36.70		39.9083
Midway Sunset		37.20	39.00	39.30	41.60	41.00	40.80	38.60	36.70		39.9083
Pt Arguello (onshore)		33.40	35.20	35.60	37.90	37.30	37.10	34.90	33.00		36.1450
San Ardo		34.80	36.60	36.90	39.20	38.60	38.40	36.20	34.30		37.5083
Seal Beach		43.15	44.95	45.25	47.55	46.95	46.75	44.55	42.65		45.8583

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.