- Gas
- Large cars
- MY2008–2009
Pontiac G8 MPG & Fuel Cost by Year
2 model years · 2008–2009
15,000 mi/yr · regular gasoline $4.36/gal (U.S. average, Sep 2026)
Pontiac G8 fuel economy at a glance
EPA has rated the Pontiac G8 for 2 model years, 2008 to 2009. Across those years its combined rating runs 15–20 MPG. The latest model year, 2009, has 4 configurations rated 15–20 MPG combined and costing $3,270–$4,360 a year to fuel at regular gasoline $4.36/gal (U.S. average, Sep 2026). The most efficient configuration on record since 2008 is the 2009 G8 3.6L 6-cyl RWD, at 20 MPG.
Pontiac G8 MPG by year
| Year | Gas (MPG) | $/yr |
|---|---|---|
| 2008-2009 (2008) Generation page | ||
| 2009 | 15–20 | $3,270–$4,360 |
| 2008 | 18–20 | $3,270–$4,460 |
Costs use the current EIA price set and 15,000 miles a year for every year, so years are comparable. Green marks the best year for each powertrain.
Pontiac G8 generations
1 generations between 2008 and 2009. Open one for the table of every model year and configuration.
2009 powertrain options
More Pontiac models
Frequently asked questions
What is the Pontiac G8's gas mileage by year?
EPA combined ratings for the Pontiac G8 run 15–20 MPG across model years 2008 to 2009. The latest year, 2009, is rated 15–20 MPG.
Which Pontiac G8 model year has the best gas mileage?
The 2009 Pontiac G8 G8 3.6L 6-cyl RWD has the highest combined rating since 2008, at 20 MPG.
How much does a Pontiac G8 cost to fuel per year?
For MY2009, EPA-rated configurations cost $3,270–$4,360 a year to fuel, driving 15,000 miles at regular gasoline $4.36/gal (U.S. average, Sep 2026). The most efficient one costs $3,270.
Has the Pontiac G8's fuel economy improved over time?
Not much. The most efficient configuration is rated 20 MPG in both 2008 and 2009.