umm dont keep putting your trans in and out of neutral all the time, not only does that not help your mileage, but it will wear down your trans a lot faster, and from what i understand, the Jeep auto trans does not need any help with premature failure. Plus if you notice, the RPMs are a little higher when in neutral, so that will use more gas than just coasting to a stop in D. A good tip would be to install a vacuum gauge some where near the instrument cluster so you can monitor just how much throttle your using, and its direct effect on your gas mileage. ex: light load or no load/ deceleration will show as high vacuum numbers(good) part or heavy load(throttle) will show as very little vacuum(bad)
I was actually thinking about doing this while I was on my way home today.

 

it depends on how cold it gets in your area, because if you in stall your cold air in the winter you might see starting/running problems simply because the air is too cold.

 

cold air = dense air your sensors should be able to compensate for the added amount of oxygen.

 

I agree with aircruiser, bp gives me better mpg in my yeep. I in the urban city up here in mn, its around 2.09 at it's cheapest. Aircruiser did you paint your rims green?

 

"Aircruiser did you paint your rims green?" my bad wrong thread

 

i calculated my gas milage the other day, and it was around 15-16 mpg, i drive around 50 miles a day, so its been gettin easier, but i would like to get better mileage too, i live in central florida, and i always get gas from kangaroo, not sure what major oil company supplies them... but i might have to try bp, or shell...

 

im gonna try a few other ones. i know that the one at the end of my road might water theirs or something idk theres sucks!