|  Definitions, Sources and Explanatory Notes |
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|  Category:   | Petroleum Consumption/Sales |
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|  Topic:      | Prime Supplier Sales Volume |
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|   Definitions |  |
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| Key Terms                                            | Definition                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
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| Conventional Gasoline                                | Finished motor gasoline not included in the oxygenated or reformulated gasoline categories. Excludes reformulated gasoline blendstock for oxygenate blending (RBOB) as well as other blendstock.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| Finished Aviation Gasoline                           | A complex mixture of relatively volatile hydrocarbons with or without small quantities of additives, blended to form a fuel suitable for use in aviation reciprocating engines. Fuel specifications are provided in ASTM Specification D 910 and Military Specification MIL-G-5572. Note: Data on blending components are not counted in data on finished aviation gasoline.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| 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.                                                                                                                                                                                                                                                                                                                                                  |
| Kerosene                                             | A light petroleum distillate that is used in space heaters, cook stoves, and water heaters and is suitable for use as a light source when burned in wick-fed lamps. Kerosene has a maximum distillation temperature of 400 degrees Fahrenheit at the 10-percent recovery point, a final boiling point of 572 degrees Fahrenheit, and a minimum flash point of 100 degrees Fahrenheit. Included are No. 1-K and No. 2-K, the two grades recognized by ASTM Specification D 3699 as well as all other grades of kerosene called range or stove oil, which have properties similar to those of No. 1 fuel oil. See Kerosene-Type Jet Fuel.                                                                                                                                                                                                                                   |
| Kerosene-Type Jet Fuel                               | A kerosene-based product having a maximum distillation temperature of 400 degrees Fahrenheit at the 10-percent recovery point and a final maximum boiling point of 572 degrees Fahrenheit and meeting ASTM Specification D 1655 and Military Specifications MIL-T-5624P and MIL-T-83133D(Grades JP-5 and JP-8). It is used for commercial and military turbojet and turboprop aircraft engines.                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |
| Midgrade                                             | 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.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| Motor Gasoline (Finished)                            | A complex mixture of relatively volatile hydrocarbons with or without small quantities of additives, blended to form a fuel suitable for use in spark-ignition engines. Motor gasoline, as defined in ASTM Specification D 4814 or Federal Specification VV-G-1690C, is characterized as having a boiling range of 122 to 158 degrees Fahrenheit at the 10 percent recovery point to 365 to 374 degrees Fahrenheit at the 90 percent recovery point. Motor Gasoline includes conventional gasoline; all types of oxygenated gasoline, including gasohol; and reformulated gasoline, but excludes aviation gasoline. Note: Volumetric data on blending components, such as oxygenates, are not counted in data on finished motor gasoline until the blending components are blended into the gasoline.                                                                   |
| Naphtha-Type Jet Fuel                                | A fuel in the heavy naphtha boiling range having an average gravity of 52.8 degrees API,20 to 90 percent distillation temperatures of 290 degrees to 470 degrees Fahrenheit, and meeting Military Specification MIL-T-5624L (Grade JP-4).  It is used primarily for military turbojet and turboprop aircraft engines because it has a lower freeze point than other aviation fuels and meets engine requirements at high altitudes and speeds.                                                                                                                                                                                                                                                                                                                                                                                                                              |
| No. 1 Distillate                                     | A light petroleum distillate that can be used as either a diesel fuel (see No. 1 Diesel Fuel) or a fuel oil.No. 1 Diesel Fuel: A light distillate fuel oil that has distillation temperatures of 550 degrees Fahrenheit at the 90-percent point and meets the specifications defined in ASTM Specification D 975. It is used in high-speed diesel engines generally operated under frequentspeed and load changes, such as those in city buses and similar vehicles.
No. 1 Fuel Oil: A light distillate fuel oil that has distillation temperatures of 400 degrees Fahrenheit at the 10-percent recovery point and 550 degrees Fahrenheit at the 90-percent point and meets the specifications defined in ASTM Specification D 396. It is used primarily as fuel for portable outdoor stoves and portable outdoor heaters.                                               |
| No. 2 Diesel Fuel                                    | A fuel that has distillation temperatures of 500 degrees Fahrenheit at the 10-percent recovery point and 640 degrees Fahrenheit at the 90-percent recovery point and meets the specifications defined in ASTM Specification D 975. It is used in high-speed diesel enginesthat are generally operated under uniform speed and load conditions, such as those in railroad locomotives, trucks, and automobiles.                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| No. 2 Diesel Fuel, High Sulfur                       | No. 2 diesel fuel that has a sulfur level above 500 ppm.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| No. 2 Diesel Fuel, Low Sulfur                        | No. 2 diesel fuel that has a sulfur level between 15 ppm and 500 ppm (inclusive).It is used primarily in motor vehicle diesel engines for on-highway use.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| No. 2 Diesel Fuel, Ultra Low Sulfur                  | No. 2 diesel fuel that has a sulfur level no higher than 15 ppm. It is usedprimarily in motor vehicle diesel engines for on-highway use.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| No. 2 Distillate                                     | A petroleum distillate that can be used as either a diesel fuel (see No. 2 Diesel Fuel) or a fuel oil(see No. 2 Fuel Oil).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| No. 2 Fuel Oil (Heating Oil)                         | A distillate fuel oil that has a distillation temperature of 640 degrees Fahrenheit at the 90-percent recovery point and meets the specifications defined in ASTM Specification D 396.  It is used in atomizing type burners for domestic heating or for moderate capacity commercial/industrial burner units.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| No. 4 Fuel Oil                                       | A distillate fuel oil made by blending distillate fuel oil and residual fuel oil stocks. It conforms with ASTM Specification D 396 or Federal Specification VV-F-815C and is used extensively in industrial plants and in commercial burner installations that are not equipped with preheating facilities. It also includes No. 4 diesel fuel used for low- and medium-speed diesel engines and conforms to ASTM Specification D 975.                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| Octane Rating                                        | A number used to indicate gasoline's antiknock performance in motor vehicle engines. The two recognized laboratory engine test methods for determining the antiknock rating, i.e., octane rating, of gasolines are the Research method and the Motor method. To provide a single number as guidance to the consumer, the antiknock index (R + M)/2, which is the average of the Research and Motor octane numbers, was developed.                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| 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.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| Oxygenated Gasoline                                  | Finished motor gasoline, other than reformulated gasoline, having an oxygen content of 2.7 percent or higher by weight and required by the U.S. Environmental Protection Agency (EPA)to be sold in areas designated by EPA as carbon monoxide (CO) nonattainment areas.Note: Oxygenated gasoline excludes oxygenated fuels program reformulated gasoline (OPRG) and reformulated gasoline blendstock for oxygenate blending (RBOB). Data on gasahol thathas at least 2.7 percent oxygen, by weight, and is intended for sale inside CO nonattainmentareas are included in data on oxygenated gasoline. Other data on gasahol are included in dataon conventional gasoline.                                                                                                                                                                                               |
| Petroleum Administration for Defense (PAD) Districts | **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. |
| Premium                                              | Gasoline having an antiknock index, i.e., octane rating, greater than 90. Note: Octane requirements may vary by altitude.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| Prime Supplier                                       | A firm that produces, imports, or transports selected petroleum products acrossState boundaries and local marketing areas, and sells the product to localdistributors, local retailers, or end users.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
| Propane (Consumer Grade)                             | A normally gaseous paraffinic compound (C3H8), which includes all products covered by Natural Gas Policy Act Specifications for commercial and HD-5 propane and ASTM Specification D 1835. It isa colorless paraffinic gas that boils at a temperature of -43.67 degrees Fahrenheit.  It does not include the propane portion of any natural gas liquid mixes, i.e., butane-propane mix.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| RBOB                                                 | "Reformulated Gasoline Blendstock for Oxygenate Blending" is motor gasoline blending components intended for blending with oxygenates to produce finished reformulated gasoline.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| Reformulated Gasoline (RFG)                          | 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. This category includes oxygenated fuels program reformulated gasoline (OPRG) but excludes reformulated gasoline blendstock for oxygenate blending (RBOB).                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| Regular                                              | 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.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| Residual Fuel Oil                                    | A general classification for the 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. It conforms to ASTM Specifications D 396 and D 975 and Federal Specification VV-F-815C. No. 5, a residual fuel oil of medium viscosity, is also known as Navy Special and is defined in Military Specification MIL-F-859E, including Amendment 2 (NATO Symbol F-770). It is used in steam-powered vessels in government service and inshore powerplants. No. 6 fuel oil includes Bunker C fuel oil and is used for the production of electric power, space heating, vessel bunkering, and various industrial purposes.                                                                                                                                                 |
| Sulfur                                               | A yellowish nonmetallic element, sometimes known as "brimstone." It is present at various levels of concentration in many fossil fuels whose combustion releases sulfur compounds that are considered harmful to the environment. Some of the most commonly used fossil fuels are categorized according to their sulfur content, with lower sulfur fuels usually selling at ahigher price.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
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| For definitions of related energy terms, refer to the   EIA Energy Glossary. |
|  	Sources |
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|  | Energy Information Administration, Forms EIA-782C, "Monthly Report of Prime Supplier Sales of Petroleum Products Sold for Local Consumption."(
Form/Instructions,
Background, Survey Methodology and Statistical Details
) |
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|  	Explanatory Notes |
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|  | Values shown for the current month are preliminary.  Values shown for the previous month may be revised to account for late submissions and corrections and are considered final. Annual averages will be available in the April Petroleum Marketing Monthly.  
  Beginning January 2007, oxygenated gasoline is included in conventional gasoline   and ultra-low sulfur diesel was added.  In conjunction with these changes, total   No. 2 diesel fuel has been eliminated to help ensure that sensitive data reported   to EIA by individual survey respondents may not be closely estimated using   the aggregates published by EIA.  
  Leaded regular gasoline was discontinued as a category after September 1993 and  does not appear in Navigator.  Therefore, prior to October 1993,   the total of regular, midgrade, and premium grades will be less than the  motor gasoline total by the amount of leaded regular gasoline.      
  Totals may not equal the sum of the components due to rounding. |
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