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iOS iPhone Utilities
E85 is often cheaper than regular Unleaded fuel, however, MPG is less. This app will quickly determine which fuel you should used based on the current fuel prices.
Understand the value provided by ethanol using this easy calculator. Ethanol has a higher octane rating than unleaded, burns cleaner, and is generally cheaper than pure unleaded gasoline. But ethanol has fewer BTU's per gallon than unleaded, so gas mileage might be a little lower than with pure unleaded gasoline. This easy calculator lets you plug in the cost of unleaded so you can see how good a deal you are getting with E-85.
NOTE: Actual mileage differences will vary based on the type of engine, vehicle and season.