im slowly working on the steps, but my suspension comes first because its toast, then its a catless downpipe and new o2

what can i do to improve gas mileage, if i can't get my gas mileage to go above 22, i gonna sell the car b/c it just isn't worth it

light on the gas, find someone with a tuner and have them mess with your maf, and i also did a little with the timing, basic things like make shure your car is aligned, tire press, and the speed your driving at

Intake, dp, make sure your plugs & 02 are good...I think 22 is possible with that and a good tune, but I don't really have any experience yet. Someone else chime in and confirm or correct me.

Not to mention, take unneeded weight out of your car, use cruise control when possible, avoid excessive idling, properly inflate tires, don't drive aggressively, and don't drive insanely fast down the freeway - your car needs more power the faster it goes.

Of course, you can also tail-gate an 18-wheeler...mythbusters proved that saves gas mileage.

I have actually used that. Not tailgating them, of course, but staying a couple car lengths back still makes a difference.

I did two things a couple weekends ago that really made a difference. I am averaging 26 mpg. I can't tell you which thing made a bigger difference, I have no clue. (1997 GTP)

1) Changed a bad front wheel bearing.

2) Broke my MAF.

Let me explain- I unscrewed the MAF module and pulled it out. It was perfectly clean, so I didn't do anything to it. But in the process of doing that I broke the bottom half of the little plastic housing that surrounds the MAF elements. I know I did, because the next day I was pulling out onto the busy street and the car instantly died. Rolled into a gas station and did some troubleshooting. The little plastic piece had spun around in the hole the MAF lives in, blocking all airflow. So I fished that piece out and carefully put the MAF back in without it.

After that day, we're talking a 3-5 MPG improvement. And the engine *seems* to run a little quieter. Combined with the new wheel bearing NOT rumbling on the highway, it's like a whole new car.

(Another thing I've done for MPG is keep the tires inflated to their maximum rating. Hasn't caused any bad tire wear. If anything it's improved it.)

I think the only thing that max tire pressure does is you feel the bumps a lot more...

you do feel bumps more, but your tire print will be slimmer as well, so you should lose less energy to friction at a cruise. I wouldn't fill it up to max because your tires are going to heat up, increasing tire pressure over what it was while cold. Just run the recommended level unless you're at the track.

Tires have a max "while cold" rating on the sidewall. Usually around 44psi. Even if you run that, you will wear out the center of your tread before too long.

I usually run 2-4psi over factory recommendations. Also, the required pressure changes drastically with different rim and tire sizes. Larger rims usually mean higher pressure.

32 around town town, 35 on the highway...lol... but thats not the grand prix.


The GP gets about 18-19 around town and 31 highway.

31HWY with the gp thats good i got my max over the weekend of 25mpg best ever

Its all in the tune, man. Its all in the tune

Before you crash, go down to 32-35. Your tires are the first part of your suspension. With no rebound ability because they are pressurized so high, they lose contact with the road. I mean they actually bounce off the road with each bump and expansion joint. Read here for expert info:

http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=1

http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=3¤tpage=1

I'm confused. I would think the average of the last 500 miles driven would be pretty good.

My DIC is actually pretty accurate.

The thing is it's based more on fuel flow vs speed. If you reset it do your normal drive by the end of the tank it'll be pretty close.

Question how good are the driver information center on gtp? Everywhere i drive which is all highway i get around 28 and in city around 23 ? maybe cause im not that modded yet?