Click here to see important news regarding the aCar App

Fuel Saving Tips

Gas/ethanol blends lower mileage

Most of our gas stations are going to gasoline with 10% ethanol blends. While gasohol is supposed to reduce emissions, it also reduces your mpg. Ethanol has about 40% less energy per gallon than gasoline. So gas with 10% ethanol will give 4% less mileage than "pure" gasoline. Unless the gasohol costs 4% less ($3.36/gal gasohol vs. $3.50 gasoline) you'll save money over the gasohol blend. Pumps with gasohol are required to be labeled "Contains up to 10% ethanol". My vehicle is flex fuel than can also use E85. Using E85 (85% ethanol/15% gas) reduces my mileage by about 30%. So unless E85 is 30% cheaper than gasoline, it's not worth it to me.

posted by jgibbsjr on September 21, 2008

this tip works for 97% of voting Fuelly members.

All Tips | Suggest a Tip