I already drive as slow as I can and don't exceed 2k rpm (to the annoyance of those behind me at lights) and try to keep it in OD at normal speed and don't go more than 65 on highways. AC is only used it I'm on the highway and its too fast to have a window open. I watch my mpg gauge real time output but its very hard for me to get it above 14, and thats when my foot is off the gas all the way. I don't tow. What I am really interested in is the whole keying off thing you talked about, would it make that much of a difference with a 560rpm idle?
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