i have a question about my gas mileage?

Question

i have a grand prix with a 3.8 v6 and 39,000 miles. And my gas mileage sucks, my rpm's run around 2300-2400 at 70 mph. To my knowledge there is nothing wrong with the car at all. I dont understand why it sucks so bad, i havent actually checked it yet but i know it sucks it down fast. Any input or advice would be appreciated!

Answer 1

First, I'd recommend that you actually calculate your gas mileage to really see if it's bad or not. It may be that your gas mileage is good, you just have a small gas tank (don't remember the gas tank size on a Grand Prix). Anyways, here are some basic tips you can do to increase your mileage:

1) Make sure the tires are filled to the manufacturers specs or slightly higher
2) Limit the use of AC during the summer
3) Try and drive more highway than city
4) Use cruise control whenever possible
5) Accelerate more slowly, and let the transmission shift into overdrive ASAP
6) check your air filter and replace if dirty
7) switch to synthetic fluid

These things should help.

-Chris

Answer 2

With these cars they do use up the gas, but a few things increase the usage. If your in a warm climate avoid using the A/C it really hits you hard on gas. If your in a cold climate, try to avoid the Defrost since it also engages the A/C compressor when on and again uses up more gas. Try not to dart off from stop lights and signs as you go no where fast and is uses up extra gas. Spend the time to keep track of it, this will let you know if you need a service.

Answer 3

check your tire pressures.
check your air filter to make sure it's clean
As well if it has dropped just recently it is probably the winter gas at the fuel stations.
Also, are you running the correct oil weight?
Spark plugs or spark plug wires in good condition.

You really should not need a tune-up with only 39,000 miles if it is a newer vehicle. Talk with the dealership service manager and they may place your vehicle on the computer and scan your car to see why it's fuel mileage stinks.

Hope you can figure it out!

Answer 4

I have a 2000 Chrysler Concorde LXi which gets around 30 mpg on the highway. I have 60000 miles. It is a 3.2 V6. I don't know your driving habits but accelerating slowly helps. The worst I've gotten in the city was about 16 mpg. Never had a tuneup.

Answer 5

Another guest has faulty info.
The use of the cruise control will burn more gas.
If you change over to synthetic oil, you cannot go back to regular oil without having the system flushed (mixing the reg. and synth. oils will gum up the engine).
I have a 3.8 liter 6cylinder Bonneville and get around 32 MPG, so don't look for much better than that on the highway and around 25 to 28 MPG in the city.

Answer 6

Define "sucks"

It's a medium sized V6 with an older design. I wouldn't expect much more than 25 mpg in real world driving out of something like that.

Do some research and figure out what your MPG actually is.

Check tire pressure. Make sure your e-brake isn't partially engaged. Check air filter.

Answer 7

The gasoline intake of a vehicle could be an analogous on a vehicle of any mileage see you later with the aid of fact the vehicle is incredibly serviced. inspite of the actual shown fact that on a sparkling vehicle you ought to run it in for one thousand miles before its able to grant height performance

Answer 8

Ha I got a dodge ext. 4x4 and get a wopping 9-11 mpg

Answer 9

there is a computer you can buy and reprogram the car and get like 20% beter but it is abought $100 talk to the people at like murries or auto zone

Answer 10

try a tune-up or take it to a good shop to have it checked out.