||Any area that does not require the sale of reformulated gasoline. All types of finished
motor gasoline may be sold in this area.
||Finished motor gasoline not included in the reformulated gasoline category.
Excludes reformulated gasoline blendstock for oxygenate blending (RBOB)
as well as other blendstock. Note: this survey designates all motor gasoline collected
within a conventional area as conventional gasoline (see conventional area).
||The classification of gasoline by octane ratings. Each type of gasoline (conventional
and reformulated) is classified by three grades - regular, midgrade, and
premium. Note: gasoline sales are reported by grade in accordance with their classification
at the time of sale. In general, automotive octane requirements are lower at high altitudes.
Therefore, in some areas of the United States, such as the Rocky Mountain States, the
octane ratings for the gasoline grades may be 2 or more octane points lower.
|Low Sulfur Diesel Fuel
||Diesel fuel containing more than 15 but less than 500 parts per million (ppm) sulfur.
||Gasoline having an antiknock index, i.e., octane rating, greater than or equal to 88
and less than or equal to 90. Note: Octane requirements may vary by altitude.
||Any area that does not meet the national primary or secondary ambient air quality standard
established by the Environmental Protection Agency for designated pollutants,
such as carbon monoxide and ozone.
||Includes sales for use in motor vehicles. For purposes of this survey, it is designed to estimate the
retail cash price of self-serve, motor vehicle diesel fuel.
||"Oxygenated Fuels Program Reformulated Gasoline" is reformulated gasoline which is intended
for use in an oxygenated fuels program control area during an oxygenated fuels program
|Petroleum Administration for Defense District (PADD):
||PADD 1 (East Coast):
PADD 1A (New England): Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont.
PADD 1B (Central Atlantic): Delaware, District of Columbia, Maryland, New Jersey, New York, Pennsylvania.
PADD 1C (Lower Atlantic): Florida, Georgia, North Carolina, South Carolina, Virginia, West Virginia.
PADD 2 (Midwest): Illinois, Indiana, Iowa, Kansas, Kentucky, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, Oklahoma, South Dakota, Tennessee, Wisconsin.
PADD 3 (Gulf Coast): Alabama, Arkansas, Louisiana, Mississippi, New Mexico, Texas.
PADD 4 (Rocky Mountain): Colorado, Idaho, Montana, Utah, Wyoming.
PADD 5 (West Coast): Alaska (North Slope and Other Mainland), Arizona, California,
Hawaii, Nevada, Oregon, Washington.
||Gasoline having an antiknock index, i.e., octane rating, greater than 90.
Note: Octane requirements may vary by altitude.
||An ozone nonattainment area designated by the Environmental Protection Agency which requires
the use of reformulated gasoline. Includes oxygenated fuels program reformulated gasoline (OPRG).
||Finished motor gasoline formulated for use in motor vehicles, the composition and properties of
which meet the requirements of the reformulated gasoline regulations promulgated by the
U.S. Environmental Protection Agency under Section 211(k) of the Clean Air Act.
(Details on this clean fuel program).
This category includes oxygenated fuels program reformulated gasoline (OPRG) but
excludes reformulated gasoline blendstock for oxygenate blending (RBOB).
Note: this survey designates all motor gasoline collected
within a reformulated area as reformulated gasoline (see reformulated area).
||Gasoline having an antiknock index (average of the research octane rating and the motor octane
number) greater than or equal to 85 and less than 88. Note: Octane requirements may vary by altitude.
||Includes all finished motor gasoline grades (regular, midgrade, premium) and formulations
|Ultra Low Sulfur Diesel Fuel
||Diesel fuel containing a maximum 15 parts per million (ppm) sulfur.
Every Monday, retail prices for all three grades of gasoline are collected by telephone from
a sample of approximately 900 retail gasoline outlets. The prices are published by 5:00 P.M.
Monday, except on government holidays, when the data are released on Tuesday
(but still represent Monday's price). The reported price includes all taxes and is the pump
price paid by a consumer as of 8:00 A.M. Monday. This price represents the self-serve price
except in areas having only full-serve. The price data are used to calculate weighted
average price estimates at the city, state, regional and national levels using sales and
delivery volume data from other EIA surveys and population estimates from the Bureau of Census.
Every Monday retail on-highway diesel prices are collected by telephone and fax from a sample
of approximately 350 retail diesel outlets, including truck stops and service stations.
The data represent the price of No. 2 diesel fuel with a sulfur level no higher than 0.05
percent by weight, except in those States exempt from the Environmental Protection Agency’s
low-sulfur requirements for on-highway diesel fuel use. The data are subjected to automated
edit checks during data collection and data processing which flag two levels of price changes.
These flagged data are verified with each respondent during the phone interview. The data are
again edited prior to computing regional and U.S. averages. The average survey response
rate for 2001 was 96.8%.
The U.S. weighted average price is calculated by weighting each regional average price by the
volume of on-highway No. 2 diesel fuel sold in that region, as determined by other EIA surveys.
The average prices are published by 5:00 P.M. Monday, except on government holidays, in which
case the data are released on Tuesday (but still represent Monday's price). These data
are made available through EIA’s hotline (202-586-6966), EIA’s web page, and through
EIA’s E-mail notification, regular and wireless .
Publication of Low Sulfur On-Highway Diesel (LSD) prices at the U.S. level was discontinued on December 8, 2008 due to a diminishing number of stations selling LSD as a result of EPA
Diesel Fuel Regulations. EIA continued to collect LSD prices from retail outlets and included them in the Diesel Average All Types price until July 26, 2010, when no more outlets reported LSD sales. Beginning July 26, 2010 publication of Ultra Low Sulfur Diesel (ULSD) price became fully represented by the Diesel Average All Types price. As of December 1, 2010 (September 1, 2006 in California), any on-highway diesel fuel sold is ULSD as mandated by EPA on-highway diesel fuel regulations.
EIA did not collect weekly retail motor gasoline data between December 10, 1990 and January 14, 1991.
Map of reformulated gasoline areas.
Information on tax rates for gasoline and diesel from the Federal Highway
Administration: Monthly ,