e30 gas mixing calculator for modified cars that are tuned to use gasoline that has a higher percentage than 10% ethanol. Gasoline pump gas vehicles use 0-10% ethanol and flexfuel vehicles use 0-85% ethanol. A tuner can alter your vehicles ECU to run with a specific percentage of ethanol in your gasoline. This application does not help with that process. This application is only used to calculate exact gas measurements to properly fill up your car after the recommendation of your tuner.
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