ASTM D5500-20a

5.1 Test Method—It was determined through field testing that intake valve deposits could adversely affect the driveability of certain automobiles.5.1.1 State and Federal Legislative and Regulatory Action—Legislative activity and rulemaking primarily by California Air Resources Board8 and the Environmental Protection Agency9 necessitate the acceptance of a standardized test method to evaluate the intake system deposit forming tendency of an automotive spark-ignition engine fuel.

5.1.2 Relevance of Results—The operating conditions and design of the engine and vehicle used in this test method are not representative of all modern automobiles. These factors shall be considered when interpreting test results.

5.2 Test Validity: 

1.1 This test method covers a vehicle test procedure for evaluation of intake valve deposit formation of unleaded spark-ignition engine fuels. This test method uses a 1985 model BMW 318iNote 1: If there is any doubt as to the latest edition of Test Method D5500, contact ASTM International.

1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.