An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Fuels Registration, Reporting, and Compliance Help

Can refiners use the E300 and E200 conversion equations in lieu of re-graphing the distillation data?

Refiners should use the most accurate means available to determine values for E200 and E300. If these parameters cannot be measured directly, they must be converted from distillation data via curve-fitting. Only if no distillation data exists can the conversion equations be used.(7/1/94)

This question and answer was posted at Consolidated List of Reformulated Gasoline and Anti-Dumping Questions and Answers: July 1, 1994 through November 10, 1997 (PDF)(333 pp, 18.17 MB, EPA420-R-03-009, July 2003, About PDF)