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low gas mileage?

coreygnar

coreygnar

New member
Ive noticed ive been getting around 15mpg around town, and this seems pretty low for what ive heard, I have a 2000 gp gt. is this right?
 


If you do a lot of sitting and ideling, that will make the avg. go down alot too.
Try going out on the highway, and while at crusing speed, say 55 mph, reset the DIC and see what it says, should be between 28-32mpg. If you get somthing really bad like 25 at that speed, I would say somthing is wrong.
Any trouble codes?
 
Well, if you’re getting 15 mpg and all you do is short trips around town, that isn’t horrible. Although most people tend to do 40-60% highway driving, and on the highway you should expect to get about 30 mpg at 60 mph. I track my gas mileage like a hawk and the more time your speed is between 40 and 60mph, and the less time you idle, your gas mileage goes way up. I typically do 60% highway driving, and I vary between 23-28 mpg averages per fill up, but I keep my car in perfect running order.

Considering the age of your car I would say it is time for a new front O2 sensor. The front O2 sensor is the most important item to get the most mpg out of your car. The second is probably is a fresh set of spark plugs, and then the MAF sensor. Keeping those three items maintained are huge factors, but to be honest there are a couple dozen of items that “could” give you bad mpg. But, one could write a book in this area.
 
im guessing its time for a tune up including an o2 sensor and fuel filter
if your air filters dirty it can be a factor in bad gas mileage
id say thats not good or average gas mileage condsidering im modded and get better mileage in my gtp
 
QUICKSILVER462 said:
If you do a lot of sitting and ideling, that will make the avg. go down alot too.
Try going out on the highway, and while at crusing speed, say 55 mph, reset the DIC and see what it says, should be between 28-32mpg. If you get somthing really bad like 25 at that speed, I would say somthing is wrong.
Any trouble codes?
Click to expand...
ill try this and see what happens
 


hey just so you know i was checking some **** out for my 07 gp and i noticed on the list of recalls that the fuel tank was recalled idk if its just 07 but they say that "THE FUEL TANK IS MISSING THE ADHESIVE LAYER THAT BONDS THE BARRIER LAYER TO THE OUTER SHELL OF THE FUEL TANK." id say itd be worth it to check out who knows you could get that **** fixed for free haha prob not nothings free anymore even its gms fault. btw got that info from this link http://www.automotive.com/used-cars/recalls/index.html
 
How is everyone getting 25-30 mpg? The best I've ever got city is 18 and the best highway is 22 and I treat my car with some respect, I don't run the Sh** out of it at all
 
Well, my car is creeping up on a good tune up, but on my last road trip I averaged like 34mpg from NC to FL...But when I popped my Overkill PCM in, I havent seen anything above 27mpg.....

My average city driving went from around 30 to 25...which sucks....

But hopefully with new plugs/fuel filter/oil filter/cleaned out air filter, I should get my MPG 's back up.
 


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