E85 was $1.79 a gallon today. 87 octane gas was $2.09 and premium was $2.59.
I was at 108726 miles, last tank was at 108469 miles, for 257 miles on this tank. I filled up with 16.435 gallons, for 15.64 miles per gallon.
I saved $13.148 on this tank by using E85 vs. premium, not considering the mileage penalty