Calculator
Results are estimates based on the values you enter. Actual ethanol content in pump fuel varies by season, region, supplier and station — test your fuel when the exact figure matters. Always follow the fuel requirements of your specific vehicle and tune. This calculator does not confirm that your vehicle or fuel system is compatible with any particular blend, and nothing it outputs is a tuning recommendation. It does not produce commanded air-fuel ratio, lambda, ignition timing or ethanol recommendations, by design.
Station data
Station information comes from the U.S. Department of Energy Alternative Fuels Data Center and, where explicitly marked, from community reports. E85 availability changes. A listed station may be temporarily out of fuel, or may no longer offer E85 at all. Confirm availability directly with the station when it matters. Fuel pricing and inventory are not real-time and are not guaranteed.
Palm Beach Dyno is not affiliated with, and is not endorsed by, the U.S. Department of Energy, the Alternative Fuels Data Center, or any station or fuel brand listed.