E85 was $1.85 a gallon today. 87 octane gas was $2.15 and premium was $2.65.
I was at 108469 miles, last tank was at 108185 miles, for 284 miles on this tank. I filled up with 16.964 gallons, for 16.74 miles per gallon.
I saved $13.57 on this tank by using E85 vs. premium, not considering the mileage penalty.