E85 was $1.18 today. 87 octane gas was $2.38 and premium was $2.88.
I was at 107002 miles, last tank was at 106699 miles, for 303 miles on this tank. I filled up with 18.411 gallons, for 16.45 miles per gallon.
I saved $9.87 by using E85 vs. premium, not considering the mileage penalty.