Current Regulations: Gasoline and diesel fuel must conform with ASTM D 4814 and D 975 respectively, including all revisions (after publication in the ASTM Annual Book of Standards and upon approval by the Board of Agriculture). The WY Department of Agriculture administers petroleum fuel quality standards. See rules for WY state agencies, Chapter 52.

At a meeting of the Wyoming Board of Agriculture via conference call on December 17, 2004, the Board of Agriculture approved a resolution that instructs the Department not to enforce the ASTM D 975 diesel lubricity standard until June 1, 2005. 

Last updated December 2005