What's your actual MPG?

[sneaky7980]

I just bought a 2004 with 60k a few weeks ago at i have calculated that MPG is 11.4. That is horrible for a 3.8! I can watch the guage move on short trips! I have no fuel leaks and the car runs great so what's the deal?

[wlkjr]

I get 25 mpg on almost every tank with a commute of 50 miles one way on rural highways. I'd say you have a bad problem and I don't have a clue. I'd start with new plugs, wires, and injector cleaning.

[Carwhiz]

ease up on the gas a bit then, something must not have been calculated right, I'm getting 28mpg on rural roads, no mods, just k&n filter. but never have the car over 3000 rpms

[JRTBandit]

Just did a road trip with a 02 w/55,000 and was able to squeeze 29mpg. The city drive is more like 20mpg.

[GPFred]

Something is going on. I have a 2000 GP SE with a 3.1 with 93K and I get 22-23 mpg around town and about 30-32 highway, and that's with a slight misfire on cylinder 1.

[SNKPWR]

i average 22-23 w/ mixed driving, some spirited driving, and just took a 600 mile round trip a couple weeks ago, hit 28 mpg at a steady 80 mph...

[gtp'n]

I have a 2000 gtp with 84,000 and I get 22.5 consistantly with all city driving

[sneaky7980]

I guess i'll run through the usual suspects ie plugs, o2 sensor, air filter.... Haven't had much time to mess with it, this car is a rushed replacement for my only other car that just died. Trying to get it running asap to sell it!

[JRTBandit]

Take it to Auto Zone or Advance and have it scanned, instead of guessing. It certainly won't hurt...

[Liljay2003]

Well i dont know if the Computer in the inside or the Car is( right), But i go across states all the time and i will reset it on the highway a a steady speed, and i can pull 35 mpg if i stay below 75 with Curise on. Like i took a 340 mile trip and at the end of the trip i had 1/4 tank if< but that problay b/cuz when i fill my car up i alway go the the next dollar if its full about 40.23 i will just keep goin to 41.00 ( gas is high right now) i put 47 in my 2002 Gp GT, last week ( gas was 3.02) Dallas,TX

[BNaylor]

11.4 mpg??

My '97 GTP is moderately modded and I get better than that. My DIC and manual calculation are very close. See below. Proof is in the pudding.



The '04 and up models should be getting much better than that.

http://www.fueleconomy.gov/feg/noframes/19798.shtml

[andylikespez]

i have a 2000 SE with the 3.1 with 75K on it, with all city i get 21, with all highway on cruise at 79 i was getting 33. only thing i have done to it is a K&N factory drop in filter

[JonJon68]

1997 GP GT w/111,500 no mods I get 33 highway 20 city. Keep us posted when you find out whats causing your bad MPG

[dale914]

so bad news, when I'm on the freeway and really using the supercharger but not really getting above 80, I can get 18mpg, but when I lay off the supercharger and slowly accelerate, I traveled for 4 hours last weekend and got 30mpg, once when I was stuck doing 55, I managed 39mpg, but around town, I can at best get 17, but if I'm hotting it around, about 9 or 12! so, sadly enough, it depends on how mellow you are driving, and I'm doing all this with a smaller pulley, I'm thinking about putting on a much larger one now ; !!

[troy1]

Originally Posted by JonJon68

1997 GP GT w/111,500 no mods I get 33 highway 20 city. Keep us posted when you find out whats causing your bad MPG

How fast you driving 55/60?

I get....
75/80mph 25/26mpg.
65/70mph 27/28mpg.
55/60mph 29/30mpg.

Intown 17/20

Best I ever got was 31.3 going 60 when I first got the car @73K