I run E85 and meth injection, it works good. I get about 30% worse gas mileage, sometimes a little worse, but it's been windy here lately so that is a factor for sure. I use an E85 calculator app on my phone and it's actually a little cheaper than using premium, but definitely do have to fill up more, so the trade off for me is time spent at the pump. I fill up every day as I drive 170 miles per day. the savings for using E85 is only like .03 cents per mile, but since the car makes more power, that's my justification.
