Bureau Home / Petroleum and Storage Tanks / Fuel Quality
In addition to monitoring accuracies at Wisconsin stores, Weights and Measures inspectors are also responsible for testing fuel quality and pump safety at stations statewide.
Guidance Documents
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