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Pontiac G8 Fuel Economy (g/100m)

g/100m Number of Vehicles
3 gallons per 100 meters 2 vehicles
4 gallons per 100 meters 16 vehicles
5 gallons per 100 meters 91 vehicles
6 gallons per 100 meters 69 vehicles
7 gallons per 100 meters 18 vehicles
8 gallons per 100 meters 1 vehicles
9 gallons per 100 meters 1 vehicles
10 gallons per 100 meters 0 vehicles
11 gallons per 100 meters 0 vehicles
12 gallons per 100 meters 0 vehicles
13 gallons per 100 meters 0 vehicles
14 gallons per 100 meters 0 vehicles
15 gallons per 100 meters 0 vehicles
16 gallons per 100 meters 0 vehicles
17 gallons per 100 meters 0 vehicles
18 gallons per 100 meters 0 vehicles
19 gallons per 100 meters 0 vehicles
20 gallons per 100 meters 0 vehicles
21 gallons per 100 meters 0 vehicles
22 gallons per 100 meters 0 vehicles
23 gallons per 100 meters 0 vehicles
24 gallons per 100 meters 0 vehicles
25 gallons per 100 meters 3 vehicles
Model Year Body/Powertrain g/100m  
2009 2009 4dr Sedan 415-hp 6.2L V8 6-sp manual RWD 5.44
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With the 309 kilowatts 6.2L V8 engine, 6-speed manual transmission, and rear-wheel drive, the 2009 Pontiac G8 has been averaging 5.44 L/100km (liters per 100 kilometers).

The 2009 Pontiac G8s in this analysis were driven mostly on the highway at an average speed of 75 kilometers per hour (about 61 percent of the kilometers driven). The rest of the kilometers were in the city (14 percent), in heavy traffic (9.5 percent), and in the suburbs (0 percent).

In addition, the average 2009 Pontiac G8 in this analysis was driven on hilly terrain with a lead foot and the AC on only some of the time.
2009 2009 4dr Sedan 361-hp 6.0L V8 6-sp shiftable automatic RWD 5.82
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2009 2009 4dr Sedan 256-hp 3.6L V6 5-sp shiftable automatic RWD 4.86
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2008 2008 4dr Sedan 361-hp 6.0L V8 6-sp shiftable automatic RWD 6.29
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2008 2008 4dr Sedan 256-hp 3.6L V6 5-sp shiftable automatic RWD 5.33
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What Our Members Are Saying about the Real Gas Mileage of the Pontiac G8

Pontiac G8 Real Gas Mileage: Cons
YearBody/PowertrainComment
2009 4dr Sedan 361-horsepower 6.0L V8
6-speed shiftable automatic RWD
Not bad mileage figures given the size of the car and the beast of an engine, but this is not a car for the hybrid set. see full Pontiac G8 review
2009 4dr Sedan 256-horsepower 3.6L V6
5-speed shiftable automatic RWD
The most MPGs I ever had was 25 and that was all highway driving at about 70. see full Pontiac G8 review
2009 4dr Sedan 415-horsepower 6.2L V8
6-speed manual RWD
Average fuel economy 15 mpg in mixed driving. see full Pontiac G8 review
2009 4dr Sedan 415-horsepower 6.2L V8
6-speed shiftable automatic RWD
Low teens in town, and 24mpg tops on the highway make this a less than ideal economy car. see full Pontiac G8 review
2009 4dr Sedan 361-horsepower 6.0L V8
6-speed shiftable automatic RWD
Is very low in stop-and-go traffic. Gets better with time, I understand. see full Pontiac G8 review
2008 4dr Sedan 256-horsepower 3.6L V6
5-speed shiftable automatic RWD
low 18 mpg city see full Pontiac G8 review
 

Pontiac G8 Gas Mileage (g/100m)

Unlike other fuel economy surveys, TrueDelta's Real-World Gas Mileage Survey includes questions about how and where a car was driven. So you can get an idea of the Pontiac G8's real-world g/100m based on how and where you drive a car.