2008 · Large Car · Gas
2008 Pontiac G8 MPG & fuel economy
The 2008 Pontiac G8 is a large car offered in 2 EPA-rated configurations. The most efficient version returns 20 MPG combined (17 city / 25 highway) on regular gasoline. Across the lineup, combined ratings range from 18 to 20 MPG. Among 31 large cars rated for 2008, it ranks 8th for lowest fuel cost. At 15,000 miles a year with $3.10/gal regular gas, it costs about $2,325 a year to fuel.
What will it cost you?
Your mileage and prices are saved and used across the site.
Fuel average
The 2008 Pontiac G8's fuel average is 8.5 km/L (11.8 L/100 km), or 20 MPG combined: 7.2 km/L in the city and 10.6 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 17 | 7.2 | 13.8 |
| Highway | 25 | 10.6 | 9.4 |
| Combined | 20 | 8.5 | 11.8 |
How it ranks among 2008 Large Cars
Full class ranking →Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.
G8 MPG across model years
Full history →2 EPA-rated configurations
| Configuration | Type | City | Hwy | Combined | Range | Your cost / yr |
|---|---|---|---|---|---|---|
| RWD · 3.6L 6-cyl · 5-speed automatic G8 |
Gas | 17 MPG | 25 MPG | 20 MPG | — | $2,325 |
| RWD · 6.0L 8-cyl · 6-speed automatic G8 |
Gas | 15 MPG | 24 MPG | 18 MPG | — | $3,292 |
Specs (most efficient configuration)
- Fuel
- Regular gasoline
- Engine / motor
- 3.6L 6-cyl
- Transmission
- 5-speed automatic
- Drivetrain
- RWD
- Passenger volume
- 107 cu ft
- Cargo volume
- 17 cu ft
- Tailpipe CO₂
- 444 g/mi
2008 Pontiac G8 vs. rivals
Compare the 2008 G8
With any other car from any year, including other G8 model years. Type a year to jump, e.g. "2015 Accord".
Frequently asked questions
What is the gas mileage of the 2008 Pontiac G8?
Up to 20 MPG combined (17 city / 25 highway); ratings range from 18 to 20 MPG depending on configuration.
What fuel does the 2008 Pontiac G8 use?
Regular gasoline.
What is the fuel average in km/L for the 2008 Pontiac G8?
The 2008 Pontiac G8's fuel average is 8.5 km/L (11.8 L/100 km), or 20 MPG combined: 7.2 km/L in the city and 10.6 km/L on the highway.
How much does it cost to fuel the 2008 Pontiac G8 per year?
About $2,325 at 15,000 miles a year with $3.10/gal regular gas, or $15.50 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.