Tim, I am just sharing the truth about what I'm doing and have done in "real world situations". My Sport trac does not get their rated mileage becuse I tow so I had it ordered with the 4.11 rear end gears, limited lock and the 4 wheel drive option (yes, the two wheel was standard). Remember, this is real world. Now for some of the other opinions that are treated as fact. All of the vehicles I have owned since 1979 have ran better on E-10. They have had no change at all to their tune ups or anything else. Better mileage and more power. I have owned Approx 12 cars and trucks including all the ACVWs during this period. I have used E-85 in my Sport trac as much as possible (E-85 is not available in all areas yet). It has started without problem with temps as low as 0 degrees F. I have much more towing power although the mileage drop is huge depending on the weight towed. I towed approx 4000 lbs 380 miles and got 11mpg. As far as btu's per gallon, I would guess that would depend on how much of it is used by your vehicle's engine in the cylinder or how much is burned by your converter. A lot of myths are treated as fact. My wife said that a lot of you guys are "book smart" and "door knob dumb".
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