Quote:
Originally Posted by bear1998
Dont you drive up the same hills to get back??
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I haven't scientifically proven this, but in my experience, if you keep the speed lower on the climb up, the fuel savings when coasting down can offset the increased fuel need on the climb up.
For example, when approaching Loveland Pass on I70, I am typically at around 55-60 mph in the right lane. If I were to try and keep up with traffic doing 65-70, my FE would tank. When coming down, I'm usually in 4th and able to maintain speed. At this point there's no fuel being fed at all, given RPMs are high enough for the ECU to shut fueling off. Driving like this I get marginally better fuel economy in the mountains than I do on I25 doing 65-75. I'm sure some of that has to do with the speed in the mountains being lower as well.