We have one place to buy E-85 in my town. The price is so high it wouldn't make much sense to purchase it though. They are charging almost 80-90 cents higher than the national average. about 10 cents cheaper than 87 unleaded
You would see at large drop in fuel effieciency. Edmunds did a test and got:
The Final Score — Fuel Economy and Cost
After refueling we put the fuel amounts and the prices paid into a spreadsheet and compiled a clear, side-by-side comparison for both fuel consumption and cost. Remember, these results apply only to this vehicle and to the prices in effect during our 667-mile test.
Gas Result: From San Diego to Las Vegas and back, we used 36.5 gallons of regular gasoline and achieved an average fuel economy of 18.3 mpg.
Gas Cost: We spent $124.66 for gasoline for the trip. The average pump price was $3.42 per gallon.
E85 Result: From San Diego to Las Vegas and back we used 50 gallons of E85 and achieved an average fuel economy of 13.5 mpg.
E85 Cost: We spent $154.29 on E85 for the trip. The average pump price was $3.09 per gallon
Gas/E85 difference:The fuel economy of our Tahoe on E85, under these conditions, was 26.5 percent worse than it was when running on gas.
A motorist, filling up and comparing the prices of regular gas and E85, might see the price advantage of E85 (in our case 33 cents or 9.7 percent less) as a bargain. However, since fuel economy is significantly reduced, the net effect is that a person choosing to run their flex-fuel vehicle on E85 on a trip like ours will spend 22.8 percent more to drive the same distance. For us, the E85 trip was about $30 more expensive — about 22.9 cents per mile on E85 versus 18.7 cents per mile with gasoline.