For those with Flex Fuel engines, how much mpg did you lose when you switched to E85? My EVIC was around 17mpg on regular gas. I started using E85 the other day (1st time) and the mpg went down to 15. I know this decrease in mpg offsets the cost savings but E85 is currently $3.29 here in MI while regular is over $4. A savings of 80 cents to $1 or more. The cost savings outweigh the mpg decrease. So, until regular gas prices go down I will be using E85.