Stocks: Reported stocks are those stocks in the custody of the refinery regardless of ownership and represent the actual measured inventories where an actual, physical measurement is possible.
Gasoline: A complex mixture of volatile hydrocarbons with or without small quantities of additives, that has been blended to form a fuel mixture suitable for use in spark-ignition engines. Motor gasoline includes reformulated gasoline, oxygenated gasoline, and other finished gasoline. Gasoline blendstocks are not included until blending is completed.
- CARB Reformulated: Gasoline formulated for use in motor vehicles that has a composition and properties certified by the California Air Resources Board.
- Non-California: All other types of gasoline exported via petroleum product pipeline to Arizona and Nevada and exported via marine tanker to Oregon, Washington, and other foreign destinations. Gasoline exports meet the specifications of destination states and countries.
- Blending Components: A product used to blend with gasoline such as straight-run gasoline, alkylate, reformate, benzene, toluene, and xylene.
Diesel: A classification for the petroleum fraction produced in conventional distillation operations. The product is used for space heating, on- and off-highway diesel engine fuel, and electric power generation. Products included in this classification are No. 1, No. 2, and No. 4 diesel fuels.
- CARB: No. 2 diesel fuel that meets the standards set by the California Air Resources Board. Prior to 2006, the maximum sulfur level was no higher than 0.05 percent by weight or 500 parts per million (ppm). From mid-2006 to present the maximum sulfur limit was reduced to 15 ppm and the aromatics content was limited to 10 percent by volume. However, most refiners produce proprietary formulations of CARB ultra-low sulfur diesel (ULSD) under the alternative formulation option that contain aromatic levels greater than 10 percent by volume.
- Other: All other types of diesel fuel exported via petroleum product pipeline to Arizona and Nevada and exported via marine tanker to Oregon, Washington, and other foreign destinations. Domestic exports of diesel fuel meet the standards set by the U.S. Environmental Protection Agency (EPA) and have a sulfur limit of 15 ppm for EPA ULSD. Foreign exports of diesel fuel meet the specifications of destination countries.
Jet Fuel: A quality kerosene product primarily used for aircraft engines. Jet fuel includes commercial and military jet fuel.
Residual: A general classification for heavier oils, known as No. 5 and No. 6 fuel oils, that remain after the distillate fuel oils and lighter hydrocarbons are distilled away in refinery operations.
- All quantities reported in thousands of barrels.
- Other diesel includes EPA diesel, renewable diesel, and high sulfur diesel.
- Ethanol added to gasoline in the following proportions:
- 2005 to 2007: 6%
- 2008 to 2009: 6.5%
- 2010 to present: 10%
Data last updated: September 20, 2023
Data Collection Information
Numbers are based on weekly reports from California refineries and are subject to refinery revision and verification from the California Energy Commission. Reports are posted weekly on Wednesday or Thursday by 5:00 p.m., timing is determined by verification of data.
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