North America Crude Oil Marketing - May 2008 Summary California Bulletins 08-CA84 to 08-CA104, 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	CA84 05/01	CA85 05/02	CA86 05/05	CA87 05/06	CA88 05/07	CA89 05/08	CA90 05/09	CA91 05/12	CA92 05/13	CA93 05/14	CA94 05/15
Buena Vista Hills		106.40	110.20	113.85	115.55	117.25	117.30	119.60	117.85	119.45	117.85	117.55
Coalinga		100.95	104.75	108.40	110.10	111.80	111.85	114.15	112.40	114.00	112.40	112.10
Huntington Beach		102.55	106.35	110.00	111.70	113.40	113.45	115.75	114.00	115.60	114.00	113.70
Kettleman Hills		109.95	113.75	117.40	119.10	120.80	120.85	123.15	121.40	123.00	121.40	121.10
Lost Hills		108.15	111.95	115.60	117.30	119.00	119.05	121.35	119.60	121.20	119.60	119.30
McKittrick		100.20	104.00	107.65	109.35	111.05	111.10	113.40	111.65	113.25	111.65	111.35
Midway Sunset		100.20	104.00	107.65	109.35	111.05	111.10	113.40	111.65	113.25	111.65	111.35
Seal Beach		107.45	111.25	114.90	116.60	118.30	118.35	120.65	118.90	120.50	118.90	118.60

California	API	CA95 05/16	CA96 05/19	CA97 05/20	CA98 05/21	CA99 05/22	CA100 05/23	CA101 05/27	CA102 05/28	CA103 05/29	CA104 05/30	Mthly Avg
Buena Vista Hills		119.70	120.30	122.15	126.10	123.70	125.10	121.60	123.75	119.30	119.95	118.9919
Coalinga		114.25	114.85	116.70	120.65	118.25	119.65	116.15	118.30	113.85	114.50	113.5419
Huntington Beach		115.85	116.45	118.30	122.25	119.85	121.25	117.75	119.90	115.45	116.10	115.1419
Kettleman Hills		123.25	123.85	125.70	129.65	127.25	128.65	125.15	127.30	122.85	123.50	122.5419
Lost Hills		121.45	122.05	123.90	127.85	125.45	126.85	123.35	125.50	121.05	121.70	120.7419
McKittrick		113.50	114.10	115.95	119.90	117.50	118.90	115.40	117.55	113.10	113.75	112.7919
Midway Sunset		113.50	114.10	115.95	119.90	117.50	118.90	115.40	117.55	113.10	113.75	112.7919
Seal Beach		120.75	121.35	123.20	127.15	124.75	126.15	122.65	124.80	120.35	121.00	120.0419

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.