ASTM or ASTM International-the national voluntary consensus standards organization formed for the development of standards on characteristics and performance of materials, products, systems, and services, and the promotion of related knowledge.
Antiknock Index or AKI-the arithmetic average of the Research Octane Number (RON) and Motor Octane Number (MON): AKI = (RON+MON)/2. In addition to anti-knock index, this value is called by a variety of names including: octane rating, posted octane, and (R+M)/2 octane.
Automotive Fuel Rating-the automotive fuel rating required under federal law.1 The automotive fuel rating for gasoline is the antiknock index. The automotive fuel rating for alternative liquid fuels consists of the common name of the fuel and the disclosure of the amount, expressed as a minimum percentage, by volume of the principal component of the fuel.
Automotive Gasoline or Automotive Gasoline-Oxygenate Blend-a type of fuel suitable for use in automotive spark-ignition internal combustion engines and also commonly used in marine and non-automotive applications.
Aviation Gasoline-a type of gasoline suitable for use as a fuel in an aviation spark-ignition internal combustion engine.
Aviation Turbine Fuel-a refined middle distillate suitable for use as a fuel in an aviation gas turbine internal combustion engine.
Base Gasoline-all components other than ethanol in a blend of gasoline and ethanol.
Biodiesel-a fuel comprised of mono-alkyl esters of long chain fatty acids derived from renewable resources including but not limited to vegetable oils, waste grease, or animal fat, and meeting the requirements of the American Society for Testing and Materials (ASTM) D-6751 or a diesel fuel substitute produced from non-petroleum renewable resources (inclusive of vegetable oils and animal fats) that meet the registration requirements for fuels and fuel additives established by the United States Environmental Protection Agency and any blending components derived from renewable fuel.
Biodiesel Blend-a blend of diesel fuel and biodiesel suitable for use as a fuel in compression ignition engines.
Biomass-Based Diesel-a non-ester renewable diesel fuel produced from non-petroleum renewable resources, including biomass, plant oils, animal fats, microbial oils, and agricultural or municipal wastes, that meets the registration requirements for fuels and fuel additives established by the Environmental Protection Agency under 42 U.S.C. 7545 and conforms to the most recent revision of the appropriate ASTM specification. It is a renewable fuel that has lifecycle greenhouse gas emissions that are at least 50 percent less than the baseline lifecycle greenhouse gas emissions, is registered as a motor vehicle fuel under 40 CFR 79, and is either a transportation fuel (ASTM D975), heating oil (ASTM D396), or jet fuel (ASTM D1655).
Biomass-Based Diesel Blend-a blend of diesel fuel and biomass-based diesel that conforms to ASTM D975 and is suitable for use as a fuel in compression ignition engines.
Cetane Index-an approximation of the cetane number of distillate diesel fuel, which does not contain a cetane improver additive, calculated from the density and distillation measurements.
Cetane Number-a numerical measure of the ignition performance of a diesel fuel obtained by comparing it to reference fuels in a standardized engine test.
Diesel Fuel-a refined middle distillate suitable for use as a fuel in a compression-ignition (diesel) internal combustion engine.
Distillate-any product obtained by condensing the vapors given off by boiling petroleum or its products.
EPA-the United States Environmental Protection Agency.
E85 Fuel Ethanol-a blend of ethanol and hydrocarbons of which the ethanol portion is nominally 75 to 85 volume percent denatured fuel ethanol.
Engine Fuel-any liquid or gaseous matter used for the generation of power in an internal combustion engine.
Engine Fuels Designed for Special Use-engine fuels designated by the commissioner as requiring registration. These fuels normally do not have ASTM or other national consensus standards applying to their quality or usability; common special fuels are racing fuels and those intended for agricultural and other off-road applications.
Ethanol or Denatured Fuel Ethanol-nominally anhydrous ethyl alcohol meeting ASTM D 4806 standards. It is intended to be blended with gasoline for use as a fuel in a spark-ignition internal combustion engine.
Fuel Oil-refined oil middle distillates, heavy distillates, residues of refining, or blends of these suitable for use as a fuel for heating or power generation, the classification of which shall be defined by ASTM D 396.
Gasoline-a volatile mixture of liquid hydrocarbons, generally containing small amounts of additives, suitable for use as a fuel in a spark-ignition internal combustion engine.
Gasoline-Alcohol Blend-a fuel consisting primarily of gasoline and a substantial amount (more than 0.35 mass percent of oxygen, or more than 0.15 mass percent of oxygen if methanol is the only oxygenate) of one or more alcohols.
Gasoline-Oxygenate Blend-a fuel consisting primarily of gasoline along with a substantial amount (more than 0.35 mass percent of oxygen, or more than 0.15 mass percent of oxygen if methanol is the only oxygenate) of one or more oxygenates.
Kerosene or Kerosine-a refined middle distillate suitable for use as a fuel for heating or illuminating, the classification of which shall be defined by ASTM D 3699.
Lead Substitute-an EPA-registered gasoline additive suitable, when added in small amounts to fuel, to reduce or prevent exhaust valve recession (or seat wear) in automotive spark-ignition internal combustion engines designed to operate on leaded fuel.
Lead Substitute Engine Fuel-for labeling purposes, a gasoline or gasoline-oxygenate blend that contains a "lead substitute."
Leaded-for labeling purposes, any gasoline or gasoline-oxygenate blend that contains more than 0.013 g of lead per liter (0.05 g lead per U.S. gal).2
Low Sulfur-low sulfur diesel fuel that meets ASTM D 975 standards, e.g., Grade Low Sulfur No. 1-D or Grade Low Sulfur No. 2-D.
Low Temperature Operability-a condition that allows the uninterrupted operation of a diesel engine through the continuous flow of fuel throughout its fuel delivery system at low temperatures. Fuels with adequate low temperature operability characteristics have the ability to avoid wax precipitation and clogging in fuel filters.
Lubricity-a qualitative term describing the ability of a fluid to affect friction between surfaces and wear to surfaces in relative motion under load.
M100 Fuel Methanol-nominally anhydrous methyl alcohol, generally containing small amounts of additives, suitable for use as a fuel in a compression-ignition internal combustion engine.
M85 Fuel Methanol-a blend of methanol and hydrocarbons of which the methanol portion is nominally 70 to 85 volume percent.
Motor Octane Number or MON-a numerical indication of a spark-ignition engine fuel's resistance to knock obtained by comparison with reference fuels in a standardized ASTM D 2700 Motor Method engine test.
Oxygen Content of Gasoline-the percentage of oxygen by mass contained in a gasoline.
Oxygenate-an oxygen-containing, ashless, organic compound, such as an alcohol or ether, which can be used as a fuel or fuel supplement.
Reformulated Gasoline-a volatile mixture of liquid hydrocarbons and oxygenates meeting the reformulated gasoline requirements of the Clean Air Act Amendments of 1990 and suitable for use as a fuel in a spark-ignition internal combustion engine.
Research Octane Number or RON-a numerical indication of a spark-ignition engine fuel's resistance to knock obtained by comparison with reference fuels in a standardized ASTM D 2699 Research Method engine test.
SAE-the Society of Automotive Engineers, a technical organization for engineers, scientists, technicians, and others in positions that cooperate closely in the engineering, design, manufacture, use, and maintainability of self-propelled vehicles.
Substantially Similar-the EPA's "Substantially Similar" rule, Section 211(f) of the Clean Air Act [ 42 U.S.C. 7545(f)].
Thermal Stability-the ability of a fuel to resist the thermal stress that is experienced by the fuel when exposed to high temperatures in a fuel delivery system.
Total Alcohol-the aggregate total in volume percent of all alcohol contained in any fuel defined in this Subchapter.
Total Oxygenate-the aggregate total in volume percent of all oxygenates contained in any fuel defined in this Subchapter.
Unleaded (when used in conjunction with engine fuel or gasoline)-any gasoline or gasoline-oxygenate blend to which no lead or phosphorus compounds have been intentionally added and which contains not more than 0.013 gram of lead per liter (0.05 g lead per U.S. gal) and not more than 0.0013 gram of phosphorus per liter (0.005 g phosphorus per U.S. gal).
Wholesale Purchaser Consumer-any person who is an ultimate consumer of gasoline, fuel methanol, fuel ethanol, diesel fuel, biodiesel, fuel oil, kerosene, aviation turbine fuel, or aviation gasoline and who purchases or obtains the product from a supplier and receives delivery of that product into a storage tank.
1 16 CFR Part 306, adopted pursuant to 15 U.S.C. 2801, et seq.
2NOTE: EPA defines leaded fuel as one which contains more than 0.0013 g of phosphorus per liter (0.005 g per U.S. gal), or any fuel to which lead or phosphorus is intentionally added.
La. Admin. Code tit. 7, § XXXV-301