Fuel Quality

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​​In addition to monitoring accuracies at Wisconsin stores, Weights and Measures inspectors are also responsible for test​ing fuel quality and pump safety at stations statewide.

​Guidance Docu​ments

New! RVP Waiver​: On April 28, 2025, the U.S. Environmental Protection Agency (EPA) issued a waiver related to Reid Vapor Pressure (RVP) requirements. Learn more​ about Wisconsin's response to this waiver.​​​​

DATCP acknowledges EPA final rulemaking on gasoline ethanol blends effective April 29, 2025. The US Environmental Protection Agency (​EPA) issued a final rule on February 29, 2024, regarding 40 CFR Part 1090, Regulation of Fuels, Fuel Additives, and Regulated Blendstocks. Effective April 29, 2025, summer gasoline-ethanol blended fuels containing between 9 and 15 percent ethanol, retailed in Wisconsin within EPA Clean Air Act (CAA) attainment areas will have a Reid vapor pressure (RVP) limit of 9.0 psi. The retail summertime fuel regulation period is between June 1 and September 15. The EPA final rule can be found here. A press release announcing the EPA will uphold the effective date can be found here.​​

Gasoline-Ethanol ​Blends Minimum Temperature: On October 4, 2024, DATCP issued a guidance document specifying enforcement discretion for fuel supply chain stakeholders at the minimum temperature for 50% evaporation for gasoline-ethanol blended fuels.​​​​

Race Gas Variances

Valor Oil Renegade 110 Race Gas Variance

Smith Oil Sunoco Standard Race Gas Variance

VP Racing Fuels VP110 Race Gas Variance