Ethanol burns with a cleaner flash wave, and in an engine designed for it with the right compression and all it will burn much more efficiently, far less heat wasted by the cooling system.
This allows a fuel with less btu per gallon to get about the same mpg as a fuel that has a higher btu per gallon.
Of course our engines are designed to burn dirty gasoline, and not take advantage of the better parts of ethanol.
For the best mpg vs cost it seems most engines since 2000 would find a sweet spot at E25-E30. That is where the cost of fuel per mile will be the lowest, lower than E85 and lower than straight gasoline.
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Today's Featured Article - On the Road with Dave Gohl: Deere Departed Friend - by Dave Gohl. Have you ever had to part with a dear friend? It's not easy. If it's due to death, your feelings could be in disarray for days, months or even years. Even now after almost 4 years, I still miss my dad. I remember when I was a kid my dad sometimes would tuck my brother and I in at night and we would ask him questions about his childhood on the farm. To this day, it's some of the best stories I've ever heard. And now, I'm so glad that I asked those questions, and if I were a little smarter i
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