Gas Mileage

hbkid22 said:

I know there are a bunch of threads on gas but I have a 2009 2dr Sport with 35s, 3.5" lift with 3.21 gears and was getting 15mpg. Lately it has been declining pretty rapidly and this last trip was all highway miles and I was getting 11.5mpg. I was driving around 70 and RPMs were around 2100-2500 depending if I was in 5th or 6th.

Questions.

Does tire pressure make a big difference on mpg? Running 30 right now but had it up at 35 at one point.

Will gears help out much?

I also have an issue when filling up gas. At times I can only pull the handle 1/4 otherwise the nozzle will turn off as if gas is full. Could there be an issue with vacuum/pressure in the tank causing issue with mpg? Might be a stretch but curious.

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Ranger4011 said:

If I was worried about has mileage would have bought a pris

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robx251 said:

I'm running 35" duratrac at 30 psi, with 4" lift with 4.88 gears on my 2010 2dr 6spd. I procaled my tire size I can get 17-18 doing real world driving at 45-55 on back roads here in Maine turning 2300-2500rpm that is an increase of 2mpg from my worn discover stt

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