Ethanol-Free Gasoline Has Pros and Cons
by Doug McAllister (Daily Herald) … We travel to Iowa about one or two times a month. At one gas station, they sell gas with 10 percent ethanol and gas without ethanol. The price difference is 40 cents more for ethanol-free. Is there an advantage of using ethanol-free gasoline as far as performance and mileage — assuming a car gets about 30 miles per gallon?
A. Thanks for the question. I don’t know for sure if you would see a significant-enough performance or mileage increase to offset the 40 cents per gallon difference.
So if your choice is between no ethanol and E15, go with no ethanol. But E10 is fine and less expensive. I hope this helps.
From Comments by Steve Vander Griend · Works at ICM, Inc.
Just like with E10, purchasing E0 is a roll of the dice as well. Today, oil refiners don’t blend and certify an E0 fuel. Oil refineries for the most part only create a regular and premium Blendstock for Oxygenated Blending which is often called a BOB.
I have asked oil refineries if they know E0 meets specifications for a legal fuel since most E0 is blended with a 50:50 mix of regular and premium BOB’s (no ethanol). Since gasoline properties like distillation and octane are not linear if simply adding two BOB’s with no ethanol, the performance of regular E0 could be better than E10 or worse.
Two summers ago as I was testing E0 in a Ford Escape, the vehicle had significant mpg loss. When I called the station, their assumption of how much regular and premium to mix wasn’t enough to ensure the consumer was getting minimum octane. READ MORE
Why Ethanol in Gas? (Yakima Herald)