Quote:
Originally Posted by strider3700
I have 4.10 gearing Not sure how that affects things with the overdrive.
It is possible for me to do most of my driving at close to 35 mph or lower but I have to determine is it better to do lots of stop signs/lights or is it better to use the highway and do 55 with a lot fewer stops. With my old truck the highway was better so long as I made certain to keep it between 50 and 55 mph. 65 was enough out of the optimal rpm that I lost close to 30% the truck couldn't do 75 but I'm sure it wouldn't have been better.
Thanks for all the suggestions so far. I'll keep an eye out for a vacuum gauge next time I'm near somewhere that will carry one.
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If you don't tow trailers much up your gearing to the 3.5 area and your FE will go up a bit on highway.
Because you have an automatic I can't recommend driving in areas with stop signs. Stop and go in an automatic is VERY difficult to get acceptable FE. On my dodge I have country-ish stop and go with hills and I can get the same as Highway fe by timing my coasting up the hills so I am down to a low enough speed to turn or stop.
Unless you can time your route perfectly in town so you never stop and tolerate coasting down to 12-18mph (normally) every time there is a stop or turn I can't recommend in town over highway. You can try it but it is very critical that you get everything mapped out and timed so you know exactly when to coast, accelerate, etc. One stop from a rather high speed can kill your FE for that entire trip. Different vehicles obviously respond differently to pulse and glide and in town driving, my dodge works OK but I need to glide up and down much more in speed than is normally acceptable and as I said one stop when I shouldn't be seems to kill my FE for the trip.
Good Luck
Ryan