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 This website is no longer updated and links to external websites and some internal pages may not work.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

When performing simple and complex model calculations, what number of decimal places need to be entered for each of the gasoline properties?

Fuel parameters should be rounded to the following decimal places:

 RVP  2 decimal places  Olefins  1 decimal place
 Benzene  2 decimal places  E200  1 decimal place
 Sulfer  0 decimal places  E300  1 decimal place
 Aromatics  1 decimal place    


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)