2009 Pontiac G8 MPG and Fuel Economy
On this page, you will find a complete guide to the miles per gallon and fuel efficiency data for the 2009 Pontiac G8.
The 2009 Pontiac G8 has 4 model options: Automatic (S5) 6-cyl, 3.6 L, Automatic (S6) 8-cyl, 6.0 L, Automatic (S6) 8-cyl, 6.2 L and Manual 6-spd 8-cyl, 6.2 L.
The 2009 Pontiac G8 Automatic (S5) 6-cyl, 3.6 L runs on regular gasoline and is in the Large Cars car class.
The 2009 Pontiac G8 Automatic (S6) 8-cyl, 6.0 L runs on regular gasoline and is in the Large Cars car class.
The 2009 Pontiac G8 Automatic (S6) 8-cyl, 6.2 L runs on regular gasoline and is in the Large Cars car class.
The 2009 Pontiac G8 Manual 6-spd 8-cyl, 6.2 L runs on regular gasoline and is in the Large Cars car class.
🛣 How Many Miles per Gallon (MPG) Does a 2009 Pontiac G8 Get?
Across all models, the combined average MPG for the 2009 Pontiac G8 is 17 miles per gallon.
The table below breaks down the MPG for each model option:
| Model Option | Combined MPG | City MPG | Highway MPG |
|---|---|---|---|
| Automatic (S5) 6-cyl, 3.6 L | 20 | 17 | 25 |
| Automatic (S6) 8-cyl, 6.0 L | 18 | 15 | 24 |
| Automatic (S6) 8-cyl, 6.2 L | 15 | 13 | 20 |
| Manual 6-spd 8-cyl, 6.2 L | 15 | 13 | 20 |
💵 What is the Average Yearly Fuel Cost for a 2009 Pontiac G8?
The average fuel costs for all models of the 2009 Pontiac G8 is $3,738.
The average fuel costs have been estimated by government regulators based on 15,000 miles driven per year, using regular gasoline, and a split of 55% city driving and 45% highway driving.
Comparing a 2009 Pontiac G8 to an average vehicle over 5 years, you will spend $7,187 more on fuel.
The table below shows the fuel costs and 5-year save/spend for each model option:
| Model Option | Fuel Cost | 5-Year Save/Spend |
|---|---|---|
| Automatic (S5) 6-cyl, 3.6 L | $3,150 | spend $4,250 more |
| Automatic (S6) 8-cyl, 6.0 L | $3,500 | spend $6,000 more |
| Automatic (S6) 8-cyl, 6.2 L | $4,150 | spend $9,250 more |
| Manual 6-spd 8-cyl, 6.2 L | $4,150 | spend $9,250 more |
🛢 How Many Barrels of Petroleum Does a 2009 Pontiac G8 Consume?
Across all models, the average number barrels of petroleum that the 2009 Pontiac G8 will consume in one year is 18 barrels.
The majority of the world's petroleum is sourced from countries like Saudi Arabia, Russia, Iraq, and the United States.
| Model Option | Barrels |
|---|---|
| Automatic (S5) 6-cyl, 3.6 L | 15 |
| Automatic (S6) 8-cyl, 6.0 L | 17 |
| Automatic (S6) 8-cyl, 6.2 L | 20 |
| Manual 6-spd 8-cyl, 6.2 L | 20 |
💨 How Many Grams of CO2 Does a 2009 Pontiac G8 Emit?
The 2009 Pontiac G8 will emit an average of 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 2009 Pontiac G8.
Overview
The tables below cover all of the miles per gallon, engine specifications, and emission details we have for the 4 2009 Pontiac G8 model options.
Automatic (S5) 6-cyl, 3.6 L
The table below contains all of the details we have for the 2009 Pontiac G8 Automatic (S5) 6-cyl, 3.6 L:
| City MPG | 17 |
|---|---|
| Highway MPG | 25 |
| Combined MPG | 20 |
| Save/Spend vs Average Car | Spend $4,250 |
| Fuel Cost | $3,150 |
| Fuel Type 1 | Regular |
| Barrels of Petroleum | 15 |
| Grams of CO2 | -15,000 |
| Trees Needed to Offset | -1 |
| Drive | Rear-Wheel Drive |
| Cylinders | 6 |
| Displacement | 3.6 |
| Transmission | Automatic (S5) |
| Vehicle Class | Large Cars |
| Start/Stop? | No |
| Supercharged? | No |
| Turbocharged? | No |
Automatic (S6) 8-cyl, 6.0 L
The table below contains all of the details we have for the 2009 Pontiac G8 Automatic (S6) 8-cyl, 6.0 L:
| City MPG | 15 |
|---|---|
| Highway MPG | 24 |
| Combined MPG | 18 |
| Save/Spend vs Average Car | Spend $6,000 |
| Fuel Cost | $3,500 |
| Fuel Type 1 | Regular |
| Barrels of Petroleum | 17 |
| Grams of CO2 | -15,000 |
| Trees Needed to Offset | -1 |
| Drive | Rear-Wheel Drive |
| Cylinders | 8 |
| Displacement | 6 |
| Transmission | Automatic (S6) |
| Vehicle Class | Large Cars |
| Start/Stop? | No |
| Supercharged? | No |
| Turbocharged? | No |
Automatic (S6) 8-cyl, 6.2 L
The table below contains all of the details we have for the 2009 Pontiac G8 Automatic (S6) 8-cyl, 6.2 L:
| City MPG | 13 |
|---|---|
| Highway MPG | 20 |
| Combined MPG | 15 |
| Save/Spend vs Average Car | Spend $9,250 |
| Fuel Cost | $4,150 |
| Fuel Type 1 | Regular |
| Barrels of Petroleum | 20 |
| Grams of CO2 | -15,000 |
| Trees Needed to Offset | -1 |
| Drive | Rear-Wheel Drive |
| Cylinders | 8 |
| Displacement | 6.2 |
| Transmission | Automatic (S6) |
| Vehicle Class | Large Cars |
| Start/Stop? | No |
| Supercharged? | No |
| Turbocharged? | No |
Manual 6-spd 8-cyl, 6.2 L
The table below contains all of the details we have for the 2009 Pontiac G8 Manual 6-spd 8-cyl, 6.2 L:
| City MPG | 13 |
|---|---|
| Highway MPG | 20 |
| Combined MPG | 15 |
| Save/Spend vs Average Car | Spend $9,250 |
| Fuel Cost | $4,150 |
| Fuel Type 1 | Regular |
| Barrels of Petroleum | 20 |
| Grams of CO2 | -15,000 |
| Trees Needed to Offset | -1 |
| Drive | Rear-Wheel Drive |
| Cylinders | 8 |
| Displacement | 6.2 |
| Transmission | Manual 6-spd |
| Vehicle Class | Large Cars |
| Start/Stop? | No |
| Supercharged? | No |
| Turbocharged? | No |
Link To or Reference This Page
If you use this page in your research, please reference MPG Buddy as the source.
<a href="https://mpgbuddy.com/cars/pontiac/g8/2009">2009 Pontiac G8 MPG and Fuel Economy</a>
"2009 Pontiac G8 MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/pontiac/g8/2009.
"2009 Pontiac G8 MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/pontiac/g8/2009. Accessed January 3, 2026.
2009 Pontiac G8 MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/pontiac/g8/2009.