Gasoline and Gasoline-Oxygenate Blends (as defined in this regulation). – Shall meet the most recent version of ASTM D “Standard. D –ASTM Gasoline Standard. ○ Covers gasoline and its blends with oxygenates for spark-ignition engines. – vol% ethanol (US. Buy ASTM D Standard Specification for Automotive Spark-Ignition Engine Fuel from SAI Global.
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Historical Version s – view previous versions of standard.
Work Item s – proposed revisions of this standard. This specification describes the various characteristics and requirements of automotive fuels for use over a wide range of operating conditions in ground vehicles equipped with spark-ignition engines.
It provides for a variation of the volatility and water tolerance of automotive fuel in accordance with seasonal climatic changes at the locality where the fuel is used.
This specification neither necessarily includes all types of fuels that are satisfactory for automotive vehicles, nor necessarily excludes fuels that can perform unsatisfactorily under certain operating conditions or in certain equipment. The spark-ignition engine fuels covered here are gasoline and its blends with oxygenates, such as alcohols and ethers, and not fuels that contain an oxygenate as the primary component, such as fuel methanol M This specification does not address the emission characteristics of reformulated spark-ignition engine fuel.
However, in addition to the legal requirements, reformulated spark-ignition engine fuel should meet the performance requirements as well. This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its astk and application. ASTM does not give any warranty express or x4814 or make any representation that the contents of this abstract are accurate, complete or up to date.
For the period May 1 through Sept. Variation of the antiknock index with seasonal climatic changes and altitude is discussed in Appendix X1.
The significance of each of the properties of this specification is shown in Appendix X1. The concentrations and types of oxygenates are not specifically astj in this specification.
ASTM D – 18d Standard Specification for Automotive Spark-Ignition Engine Fuel
The composition of both unleaded and leaded fuel is limited by economic, legal, and technical consideration, but their properties, including volatility, are defined by this specification.
In many countries, regulatory authorities having jurisdiction have set laws and regulations that limit the concentration of oxygenates and certain other compounds found in spark-ignition engine fuel. In the United States, oxygenate types and concentrations are limited to those approved under the U.
With e4814 to fuel properties, including volatility, this specification can be more or less restrictive than the EPA rules, regulations, and waivers. Refer to Appendix X3 for discussions of EPA rules relating to fuel volatility, lead and phosphorous contents, sulfur content, benzene content, deposit control additive certification, and use of oxygenates in blends with unleaded gasoline.
Contact the EPA for the latest versions of the rules and additional requirements. Reformulated spark-ignition engine fuel is required in some areas to lower emissions from automotive vehicles, and its characteristics are described in the research report on reformulated asm engine fuel.
The specification is under continuous review, which can result in revisions based on changes in fuel, automotive requirements, or test methods, or a combination thereof. All users of this specification, therefore, should refer to the latest edition. Consequently, the type of fuel under consideration must first be identified in order to select applicable tests.
Standard Specification for Automotive Spark-Ignition Engine Fuel
Test Method D provides a procedure for determining oxygenate concentration in mass percent. Test Method D also includes procedures for calculating mass oxygen content and oxygenate concentration in volume percent.
Appendix X4 provides a procedure for calculating the mass oxygen content of a fuel using measured oxygenate type, oxygenate concentration in volume percent, and measured density or relative density of the fuel. For a specification limit expressed as an integer, a trailing zero is significant only if the decimal point is specified.
For a specified limit expressed as an integer, and the right-most digit is non-zero, the right-most digit is significant without a decimal point being specified. Values given in parentheses are provided for information only. Many of the values shown in Table 1 were originally developed using U.
As a result, conversion of the SI values will sometimes differ slightly from the U. In some cases, U. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Referenced Documents purchase separately The documents listed below are atm within the subject standard but are not provided as part of the standard. Link to Active This link will always route to the current Active version of the standard.