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As far as fuel economy, I had a tank of E85 on a day when it was cold enough to cause the car to act up on it, causing a forced P&G (only way it would run right was to floor it). There was a powerful wind- had to have been about 40 mph blowing straight up my tailpipe- virtually no x-wind component. Pulses were much quicker than usual, glides were waaaaay longer than usual, plus I went faster than usual. IIRC I went about 170 miles this way and recorded 68 mpg for that segment. Topped off cuz I wanted to dilute that E85. Yes, I know, short fill fraught with potential measuring error... but even so it had to have been really good; me and my car have never come even close to that mark before or since.
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