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· Master Baiter
22,141 Posts
It really depends on how you drive your vehicle.

When I was DDing the Subaru and I had a 55-60 mile RT commute, 90% Interstate, I hardly ever saw enough boost to make the EWG open up (let-alone full power). I could go an entire work week and not hear it once; I don't need E85 for that. There were other weeks where the weather was nice and I would do some fun driving up in the hills during the week, in which E85 would've been nice. On weekends, I'd likely want to run E85, and then on Sunday, I'd probably top off with pump fuel again.

My thoughts are to have an idea what your driving for that tank will be and make a game time decision which fuel to use; just make sure to choose pump gas once in a while. The joy of flex-fuel (vs reflashing based on fuel type) is that if you get a phone call from a buddy who wants to go out driving after work and you're still half-full on pump gas, you can fill up the remainder with E85 and let the blending tables do their thing.
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