Hey guys with GTP'S

I'm wondering what your gas milage is? Cause I have a 99GTP, and I get 15mpg is this normal or just needs a really bad tune up, and also I barely drive just to work or home, and I rarely race or gun it

i get about that too...on a good tank, but thats because my foot gets realllly heavy nowadays with the intake and exhaust...lol...but i think were supposed to get 18 city and 28 highway, but someone can correct me on that one...

Thats what it says on the internet...between 18 and 27. My in car thing reads just over 20 most of the time but I don't know how accurate that thing is or how it gets that number. I just got the car and haven't put a full tank through it so I can't say for sure.

the worst i've gotten was 19...best was 25ish...usually hangs about 22-23 tho...i do a 50/50 split of in town and highway driving...and i have a heavy foot...i'd say give her a tune-up soon!

Probably a good needed tune up.

I get anywhere between 15-17 (DIC reading) in the city.

I get 19-20 mpg (calculated) on a 90% city/10% highway mix. Lot's of spirited driving, hard to avoid that. This is on E85, on 93 octane I used to get 21-22 mpg, same type of driving.

To get better than 15 mpg you may need a tune up or stay away from boost for a tank (very hard to do) and see if the mileage goes up. If you do a lot of short trips, that will cause low mileage.

i get about 16 in the city

Sounds like you need to tune. O2 sensor, filters, etc. It's hard to pinpoint gas mileage things.

I used to get 23-25 mixed, until someone got ahold of it, and now I couldn't tell you until I get rid of this tank of gas.

Ordonez, if you still have the GT tranny with your top-swap, you're going to get worse MPG than an actual GTP because of the gearing.

GTPJesse: Depends on a lot of things... The bigest one is your style of driving and whether or not you mostly tool around the city or cruise the freeway.

I knew someone with a GTP who got average of 16 with pure city stop and go. Never had to go more than 5-10 miles to work with plenty of traffic...

And then there's the people I know who routinely do mixed driving and have gotten anywhere from 20-26mpg...

Can't speak for the hybrid cars that are cruising around here with GT trannies and top end swaps... But, Arcxnus presents a good argument on those...

I'm getting about 27 mixed driving.

If I use mine to commute to work 8 miles each way four on the highway I'll get 20. If my wife commutes to work 3 miles all stop and go she'll get about 18. But with a good mix of highway and city on a tank I'll get roughly 24. All highway depending on hills and such 28-34.

Which is way better then the 15 I get around town in my Silverado.

I get about 18-19 in town and about 26-30 on the highway depending on wether or not i am drafting.

My car has 87k on original plugs and wires with 93octane gas.

All I have done is an intake and I like to hear the supercharger.

My stock '99 GTP sedan averages about 22-23 mpg when I use it for my commute to work. That's a good mix of street, freeway, and stop and go traffic. I also have a heavy foot, so my passengers tell me.

My wife gets much less than that when she uses it as a grocery getter. On long trips, I can average about 25 mpg.

usualy about 9 in the city.....right now im getting 12 but im babbying it