North America Crude Oil Marketing - August 2010 Summary California Bulletins 10-CA146 to 10-CA167, 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	CA146 08/02	CA147 08/03	CA148 08/04	CA149 08/05	CA150 08/06	CA151 08/09	CA152 08/10	CA153 08/11	CA154 08/12	CA155 08/13	CA156 08/16	CA157 08/17
Buena Vista Hills		80.35	81.55	81.70	81.25	79.95	80.75	79.50	77.25	74.95	74.60	74.45	75.00
Coalinga		75.30	76.50	76.65	76.20	74.90	75.70	74.45	72.20	69.90	69.55	69.40	69.95
Huntington Beach		74.30	75.50	75.65	75.20	73.90	74.70	73.45	71.20	68.90	68.55	68.40	68.95
Kettleman Hills		83.65	84.85	85.00	84.55	83.25	84.05	82.80	80.55	78.25	77.90	77.75	78.30
Lost Hills		82.00	83.20	83.35	82.90	81.60	82.40	81.15	78.90	76.60	76.25	76.10	76.65
McKittrick		74.55	75.75	75.90	75.45	74.15	74.95	73.70	71.45	69.15	68.80	68.65	69.20
Midway Sunset		74.55	75.75	75.90	75.45	74.15	74.95	73.70	71.45	69.15	68.80	68.65	69.20
Seal Beach		78.85	80.05	80.20	79.75	78.45	79.25	78.00	75.75	73.45	73.10	72.95	73.50

California	API	CA158 08/18	CA159 08/19	CA160 08/20	CA161 08/23	CA162 08/24	CA163 08/25	CA164 08/26	CA165 08/27	CA166 08/30	CA167 08/31		Mthly Avg
Buena Vista Hills		74.65	73.65	72.70	72.35	70.90	71.80	72.65	74.45	73.95	71.15		75.8355
Coalinga		69.60	68.60	67.65	67.30	65.85	66.75	67.60	69.40	68.90	66.10		70.7855
Huntington Beach		68.60	67.60	66.65	66.30	64.85	65.75	66.60	68.40	67.90	65.10		69.7855
Kettleman Hills		77.95	76.95	76.00	75.65	74.20	75.10	75.95	77.75	77.25	74.45		79.1355
Lost Hills		76.30	75.30	74.35	74.00	72.55	73.45	74.30	76.10	75.60	72.80		77.4855
McKittrick		68.85	67.85	66.90	66.55	65.10	66.00	66.85	68.65	68.15	65.35		70.0355
Midway Sunset		68.85	67.85	66.90	66.55	65.10	66.00	66.85	68.65	68.15	65.35		70.0355
Seal Beach		73.15	72.15	71.20	70.85	69.40	70.30	71.15	72.95	72.45	69.65		74.3355

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.