2008 Pontiac G8
20MPG
Combined
2
Trims
2008
2009 →
Updated February 27, 2026
The 2008 Pontiac G8 is a Full-Size Sedan that delivers 18–20 combined MPG depending on trim. Here’s everything you need to know about this vehicle, from fuel economy to safety ratings.
2008 Pontiac G8 Specifications
| Spec | Value |
|---|---|
| Combined MPG | 18–20 combined MPG depending on trim |
| City MPG | 17 |
| Highway MPG | 25 |
| Body Style | Full-Size Sedan |
| Fuel Type | Premium |
| Drive | RWD |
| Available Trims | 2 |
Available Trims
| Trim | MPG (City/Hwy/Combined) | Engine | Transmission |
|---|---|---|---|
| 8 cyl | 15/24/18 | 6.0L 8cyl | Automatic (S6) |
| 6 cyl | 17/25/20 | 3.6L 6cyl | Automatic (S5) |
Annual Fuel Cost
Based on EPA estimates, the 2008 Pontiac G8 costs approximately $2,725 per year in fuel. This assumes 15,000 miles driven annually and current fuel prices.
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Other Model Years
- 2009 Pontiac G8
- 2008 (this page)
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