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View Full Version : Post Your G8 GT's MPGs


SRG963
10-10-2008, 12:57 PM
I'm getting 21.7 average and I never get passed :)
sultech
10-10-2008, 01:06 PM
10.9
SLVRG8GT
10-10-2008, 01:39 PM
getting 17-18 city no real hwy test yet. 1100 miles and counting..
jbradsh1
10-10-2008, 02:35 PM
19.9 mpg since I picked up the car, and it has over 5,000 miles on it (in just over a month), a lot of which has been freeway driving!
GXPaycheck
10-10-2008, 05:45 PM
Measured highway (70mph on the interstate) 25mpg. 18-19 around town. DashHawk says average of 23.
todds87ss
10-10-2008, 06:02 PM
18...much of that is over 100, though...
MtbDoc
10-10-2008, 06:24 PM
31...but I was smart enough to buy that super-duper ram air intake!!!


Actually, I am seeing around 20 in mixed driving (a good bit on the highway) and got 22 last week on a road trip @ 78 mph...well, I wasn't going 78 when the cop hit me with his laser, but I digress...
It's A G8!
10-10-2008, 07:02 PM
11 mpg
BlueJacket
10-10-2008, 09:04 PM
18mpg I need to lean to slow done on the freeway so that AMF will kick in.;)
g8_795
10-11-2008, 01:22 AM
18.3 average here.

Since getting all of my mods I have noticed that if you go 55-60 with AFM you can get 28-30 average on the highway. But who can drive 55-60 continuously?
Tate
10-11-2008, 01:56 AM
I'm right at 14.5 but it's say 95% city with a speed limit of 35 or less. Damn base housing FTL.
Tate
MtbDoc
10-11-2008, 03:03 AM
But who can drive 55-60 continuously?

And who would want to?
bobyoung
10-11-2008, 05:24 PM
I reset the odometer ever time I fill up. I use Shell 93 usually. I average about 18 combined just like advertised. I followed a friend to Brooklyn NY last week and averaged between 65 and 70 MPH all the way and got 26 MPG, flew home averaged around 80 MPH and got about 22. I consider this car to be really good on gas. I have a couple of 95 Roadmasters with detuned LT-1's in them putting out about 260 HP and I get 20-21 if I drive them very easy on the highway, (which I don't of course) I get about 17-18 MPG combined, so again I consider the G8 GT to really be good on gas. The highway mileage is great with the G8 GT. I have approx. 2500 miles on the car at this point.
G8Smitty
10-11-2008, 05:38 PM
17.5 after my tune, with a 33mph average. 90% around town driving.
norm8332
10-11-2008, 06:13 PM
16.8...I guess i like to take off a bit too much.