Pontiac G8 MPG and Fuel Economy

Pontiac have been manufacturing models of G8 for 2 years, with the latest vehicle in 2009 having a combined MPG of 20.

The estimated fuel cost for the 2009 Pontiac G8 is $3,150 per year.

Government regulators have estimated that value based on 15,000 miles driven per year, using regular gasoline, and a split of 55% city driving and 45% highway driving.

💵 Compared to an average vehicle over 5 years, you will spend $4,250 more on fuel driving a 2009 Pontiac G8.

🛢 The Pontiac G8 will consume roughly 15 barrels of petroleum per year, using the standard estimate of 15,000 miles per year.

💨 For every mile driven, the Pontiac G8 will emit -1 grams of CO2, which is about -15,000 grams of CO2 per year.

🌳 To help you understand the impact of this, a normal tree will absorb around 21,000 grams of CO2 per year. This means that roughly 1 tree would be needed to offset emissions from the Pontiac G8.

The table below is a complete list of the 2 Pontiac G8 fuel efficiency specifications we have data for.

Click any vehicle link to see a more detailed breakdown of the car, miles per gallon, emissions, and more.

VehicleCombined MPGFuel Cost
2009 Pontiac G820$3,150
2008 Pontiac G818$4,100

Link To or Reference This Page

If you use this page in your research, please reference MPG Buddy as the source.

  • "Pontiac G8 MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/pontiac/g8.

  • "Pontiac G8 MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/pontiac/g8. Accessed January 3, 2026.

  • Pontiac G8 MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/pontiac/g8.