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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For the period May 1 through Sept.
Test Method D provides a procedure for determining oxygenate concentration in mass percent. For a specification limit expressed as an integer, a trailing zero is significant only if the decimal point is specified.
As a result, conversion of ashm SI values will sometimes differ slightly from the U. Test Method D also includes procedures for calculating mass oxygen content and oxygenate concentration in volume percent. Referenced Documents purchase separately The documents v4814 below are referenced within the subject standard but are not provided as part of the standard.
This standard does zstm purport to address all of the safety concerns, if any, associated with its use. H 2 Appendix D44814 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.
However, in addition to the legal requirements, reformulated spark-ignition engine fuel should meet the performance requirements as well. 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.
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.
This convention applies to specified limits in Tables 1, 3, and Table X8. The following equation is to be used to make the conversion: However, depending on oxygenate type, as oxygenate content increases above some threshold level, the likelihood for vehicle problems also increases.
This abstract is a brief summary of the referenced standard. This specification does not address the emission characteristics of reformulated spark-ignition engine fuel.
ASTM D – 18d Standard Specification for Automotive Spark-Ignition Engine Fuel
Gasolines meeting these limits are not suitable for blending with ethanol. 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.
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. All users of this specification, therefore, should refer to the latest edition.
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. Reformulated spark-ignition engine fuel is required in some areas to lower emissions from automotive vehicles, and qstm characteristics are ast, in the research report on reformulated spark-ignition engine fuel.
Standard – Standard Specification for Automotive Spark-Ignition Engine Fuel ASTM D –
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. In many countries, regulatory authorities having jurisdiction have set laws and regulations that limit the concentration of oxygenates and certain dd4814 compounds found in spark-ignition engine fuel.
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 asm the primary component, such as fuel methanol M Variation of the antiknock index with seasonal climatic changes and altitude is discussed aetm Appendix X1.
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. Consequently, the type of fuel under consideration must first be identified in order to select applicable tests.
Refer to Appendix X3 for discussions of EPA rules relating to fuel volatility, d484 and phosphorous contents, 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. Note 2—Many of the values shown in Table 1 were originally developed using U.
ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. The significance of each of the properties of this specification is shown in Appendix X1. For a d414 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.
Standard Specification for Automotive Spark-Ignition Engine Fuel
It is asym responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. This specification does not apply to fuels that contain an oxygenate as the primary component, such as Fuel Methanol M Historical Version s – view previous versions of standard. Values given in parentheses are provided for information only.