Gas Requirements for a Mini Cooperby Robert Moore
Mini recommends running a minimum of 91 octane, top-tier gasoline in all of their 2014 models, but octane level is only part of the equation.
It's All About the Corn
Your Mini's engine is designed to run on fuel with a maximum of 10 percent ethanol. Anymore than 10 percent ethanol -- this includes E85 fuel -- can cause damage to your engine and fuel system. If you must use fuel containing 15 percent ethanol, you must use a fuel additive to counteract the effects of the ethanol. Mini also recommends avoiding other blended fuels such as those that contain methanol or alcohol.
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