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generally, staying in the highest gear is best. I also live in a very hilly part of the country, and I do have a scanguage. But I don't have the fortune to have a stick, so flooring it would cause it to downshift. But I do know in the instances I do end up having to downshift, the mpg goes down instantly. Generally, if i see a hill coming I try to build up as much momoentum as I need (and is legal and safe, of course) so i don't have to downshift.
I wouldn't floor it though. A modern engine will richen the mixture as a self preservation technique at wide open throttle, so stay away from that. Give her 80% or so, and keep it in 5th as long as possible.
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 RIP Maxima 1997-2012
Quote:
Originally Posted by jamesqf
I think you missed the point I was trying to make, which is that it's not rational to do either speed or fuel economy mods for economic reasons. You do it as a form of recreation, for the fun and for the challenge.
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