The only vehicle I ever had that I noticed a huge difference on alcohol in fuel was a 1992 Chevrolet Lumina - its MPG would drop at least 50% and it would run like complete crap with a severe power loss. This was back when they were adding METHANOL, so not sure if that's why there were such terrible results.
The toyota I replaced it with and both Fords after that barely notice ethanol - they all had a very slight MPG drop using it, but not enough to justify paying 15 cents a gallon more for the non-ethanol fuel at the pump.
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