| Key Terms |
Definition |
| Conventional Area |
Any area that does not require the sale of reformulated gasoline. All types of finished
motor gasoline may be sold in this area.
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| Conventional Gasoline |
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).
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| Gasoline Grades |
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.
|
| Midgrade Gasoline |
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.
|
| Nonattainment Area |
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.
|
| On-Highway Diesel |
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.
|
| OPRG |
"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
control period.
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| Petroleum Administration for Defense District (PADD): |
PADD I (East Coast):
PADD IA (New England): Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont.
PADD IB (Central Atlantic): Delaware, District of Columbia, Maryland, New Jersey, New York, Pennsylvania.
PADD IC (Lower Atlantic): Florida, Georgia, North Carolina, South Carolina, Virginia, West Virginia.
PADD II (Midwest): Illinois, Indiana, Iowa, Kansas, Kentucky, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, Oklahoma, South Dakota, Tennessee, Wisconsin.
PADD III (Gulf Coast): Alabama, Arkansas, Louisiana, Mississippi, New Mexico, Texas.
PADD IV (Rocky Mountain): Colorado, Idaho, Montana, Utah, Wyoming.
PADD V (West Coast): Alaska (North Slope and Other Mainland), Arizona, California,
Hawaii, Nevada, Oregon, Washington.
|
| Premium Gasoline |
Gasoline having an antiknock index, i.e., octane rating, greater than 90.
Note: Octane requirements may vary by altitude.
|
| Reformulated Area |
An ozone nonattainment area designated by the Environmental Protection Agency which requires
the use of reformulated gasoline. Includes oxygenated fuels program reformulated gasoline (OPRG).
|
| Reformulated Gasoline |
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).
|
| Regular Gasoline |
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.
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| Total Gasoline |
Includes all finished motor gasoline grades (regular, midgrade, premium) and formulations
(conventional, reformulated).
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