Quote Originally Posted by Fivefingerdeathpunch View Post
Unless you can tune for it, you won't want to do that.

E85 requires at a minimum of 30% more fuel flow compared to regular unleaded gasoline.

Even though E85 if it's actually 85% alcohol is roughly 105 octane there is a draw back (most winter blends are E50 or E60 right now). It requires larger fuel injectors for more fuel and should always be tuned for. Also you get roughly 30% less fuel mileage.

So even with a 50/50 mixture it's likely to be around E30 or E40 in the tank. Sure it's higher octane than regular 91 by a little bit but it's still something I wouldn't do unless you had a tuner.
Seen somewhere that was calculated to mix fuel to get 93 Octane but I don't know much about this Octane numbers and levels. You just educated me on some of it. Thanks

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