What gas mileage are you getting?

120860 Views 232 Replies 141 Participants Last post by 08-2.4l dave, Nov 12, 2020

05G6GTstanger

Discussion Starter · Mar 29, 2005

Im just about through my first tank, and I only got about 17 MPG with some highway and soem city, not getting on it at all....

What kind of mileage are you getting and how many miles are on your car, i think mine just needs to be broken in, im only at 150 miles....

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360ci

· #160 · Mar 30, 2013

My 06 GT does very well. It cruises decently and can pull itself up hills on the highway without worry of downshifting from overdrive. I can get 29-31mpg with it depending on speed. Southern Ontario roads don't have many rolling hills to use in the sake of fuel economy. No matter which vehicle I use the throttle is almost always on, even if I use cruise control.

Strictly city driving I'm lucky to see 18mpg as I use the auto stick and keep rpm in the 2500-4000rpm range.

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360ci

· #163 · Mar 31, 2013

My 29-31mpg highway is also staying under 70mph. I also check my tire pressure once a week

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360ci

· #169 · May 20, 2013

Jay-001 said:
Getting less than 380kms out of a full tank of gas. 60% city driving and 30% highway driving.. anyone know why i have terrible gas mileage?

City driving is your culprit, especially if you have the V6. There are several factors that you have to consider such as:

Tire pressure (check at least once a week)
Speed
Acceleration to get up to speed & passing.
Weight in the vehicle
Air filter relatively clean - no rodent nests, etc
Fluids are changed regularly (12,000kms on cheap engine oil can increase engine friction which can lead to increased fuel use)
Heat - driving in traffic will make the cooling fans come on more often, heat is the main enemy of all engine components

Just to elaborate on tire pressure, some tiers for the G6 with higher speed ratings use upwards of 50psi, versus the stock 30-34psi setting. Running tires more than 5psi under their maximum will increase drag and can affect handling. I have V rated General UHP tires which are rated at 50psi, but I want a compromise with ride comfort and handling so I set them at 44psi. Most shops, after a service will lower them down to 30-32psi as per the door sticker, because the OEM Continental tires had a max of 35psi.

I don't recommend over inflating tires as it can prematurely bald the centre portion of the tread. In the hopes of better fuel economy (most of the time it will net 1-2mpg increase) is to take 35psi tires, and inflate them to 40psi, which in turn after a trip on the highway will warm up so they read 44psi. Handling then goes out the door, along with braking performance as the tread contact patch is limited. Just food for thought.

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360ci

· #183 · Aug 11, 2013

Jay-001 said:
damn that is good..the highest my car recently got on the display was 600km but on a long road trip..but the tank i have now in my car only got 220kms from full to half tank which is pathetic for a 65L gas tank.. did you do anything to your car? what maintenance repairs have you done? let me know!!

All G6s have a 16.0gal tank, or 60.5L. Factor in a ~8L reserve (when the low fuel light comes on) and 220kms on half a tank isn't that bad.

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360ci

· #203 · Dec 16, 2013

I drove 951 km over two tanks and my average is 12.3L/100 km after filling up yesterday, with 80-90% winter city driving.

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