- Newest year: 2008
- Gas
- Midsize cars
2004-2008 Pontiac Grand Prix MPG & Fuel Cost
5 model years · 19–21 MPG combined
15,000 mi/yr · regular gasoline $4.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 6 of 10 midsize car configurations, MY2008. Ranked against all rated configurations, not sales-weighted.
2004-2008 Pontiac Grand Prix at a glance
The 2004-2008 Pontiac Grand Prix covers 5 model years in the EPA database (17 configurations in all), rated 19–21 MPG combined. The newest model year, 2008, costs about $3,110 a year to fuel for its most efficient version, the Grand Prix 3.8L 6-cyl FWD (21 MPG), at regular gasoline $4.36/gal (U.S. average, Sep 2026). EPA changed the ratings in 2005, 2006 and 2008; 2007 repeat the values of the year before.
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
2004-2008 Pontiac Grand Prix by model year
| Model year | Powertrains | Combined | $/yr | EPA ratings |
|---|---|---|---|---|
| 2008 | Gas | 19–21 MPG | $3,110–$4,230 | Ratings changed |
| 2007 | Gas | 19–21 MPG | $3,110–$4,230 | Same EPA ratings as 2006 |
| 2006 | Gas | 19–21 MPG | $3,110–$4,230 | Ratings changed |
| 2005 | Gas | 19–21 MPG | $3,110–$4,230 | Ratings changed |
| 2004 | Gas | 19–21 MPG | $3,110–$4,230 | First year |
What the 2008 Grand Prix 3.8L 6-cyl FWD costs to drive
Per month
$259
$3,110 a year ÷ 12
Per 25 miles
$5.18
Per 100 miles
$20.73
Five years
$15,550
5 × the yearly cost, prices held at today's level
vs the midsize car median
$380less a year
Class median $3,490 a year, MY2008
Based on 15,000 miles a year and regular gasoline $4.36/gal (U.S. average, Sep 2026).
2008 Pontiac Grand Prix MPG
Versus 2007: The most efficient configuration stays at 21 MPG. Its annual cost stays at $3,110.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Grand Prix 3.8L 6-cyl (Most efficient) | 3.8L 6-cyl | FWD | 18 | 28 | 21 | $3,110 |
| Grand Prix 5.3L 8-cyl | 5.3L 8-cyl | FWD | 16 | 25 | 19 | $4,230 |
1 configuration requires or recommends higher-octane gasoline and is costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2007 Pontiac Grand Prix MPG
Same EPA ratings as 2006
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
EPA lists the same ratings for the 2007 Pontiac Grand Prix as for the 2006 model, so the configurations and costs are the ones in the 2006 section above.See 2006
2006 Pontiac Grand Prix MPG
19–21 MPG · $3,110–$4,230/yr
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
Versus 2005: The most efficient configuration stays at 21 MPG. Its annual cost stays at $3,110.
Gas configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Grand Prix 3.8L 6-cyl (Most efficient) | 3.8L 6-cyl | FWD | 18 | 28 | 21 | $3,110 |
| Grand Prix 3.8L 6-cyl supercharged FWD Automatic 4-spd | 3.8L 6-cyl supercharged | FWD | 17 | 26 | 20 | $4,020 |
| Grand Prix 3.8L 6-cyl supercharged FWD Automatic (S4) | 3.8L 6-cyl supercharged | FWD | 17 | 26 | 20 | $4,020 |
| Grand Prix 5.3L 8-cyl | 5.3L 8-cyl | FWD | 16 | 25 | 19 | $4,230 |
3 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2005 Pontiac Grand Prix MPG
19–21 MPG · $3,110–$4,230/yr
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
Versus 2004: The most efficient configuration stays at 21 MPG. Its annual cost stays at $3,110.
Gas configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Grand Prix 3.8L 6-cyl (Most efficient) | 3.8L 6-cyl | FWD | 18 | 27 | 21 | $3,110 |
| Grand Prix 3.8L 6-cyl supercharged FWD Automatic 4-spd | 3.8L 6-cyl supercharged | FWD | 17 | 26 | 20 | $4,020 |
| Grand Prix 5.3L 8-cyl | 5.3L 8-cyl | FWD | 16 | 25 | 19 | $3,440 |
| Grand Prix 3.8L 6-cyl supercharged FWD Automatic (S4) | 3.8L 6-cyl supercharged | FWD | 16 | 24 | 19 | $4,230 |
2 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2004 Pontiac Grand Prix MPG
19–21 MPG · $3,110–$4,230/yr
EPA re-estimated ratings of 1985-2007 vehicles under its 2008 method; these figures are the re-estimated values.
Gas configurations (3)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| Grand Prix 3.8L 6-cyl (Most efficient) | 3.8L 6-cyl | FWD | 18 | 28 | 21 | $3,110 |
| Grand Prix 3.8L 6-cyl supercharged FWD Automatic 4-spd | 3.8L 6-cyl supercharged | FWD | 16 | 26 | 20 | $4,020 |
| Grand Prix 3.8L 6-cyl supercharged FWD Automatic 4-spd | 3.8L 6-cyl supercharged | FWD | 16 | 25 | 19 | $4,230 |
2 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
Fuel cost by state
Yearly cost of the Grand Prix 3.8L 6-cyl FWD: $4,230 in California and $2,710 in Texas, a $1,520 difference.
- California $4,230
- Washington $3,920
- New York $3,110
- Florida $2,940
- Texas $2,710
Similar cars
Closest combined MPG among MY2008 midsize car models.
Generations
- 2000-2003 (7th gen)
- 2004-2008 (8th gen)
Frequently asked questions
What gas mileage does the 2004-2008 Pontiac Grand Prix get?
EPA rates the 2004-2008 Pontiac Grand Prix at 19–21 MPG combined across 17 configurations and 5 model years. The most efficient version, the 2008 Grand Prix 3.8L 6-cyl FWD, is rated 21 MPG (18 city, 28 highway).
Which years had the best MPG in the 2004-2008 Pontiac Grand Prix?
Every model year of the 2004-2008 Pontiac Grand Prix tops out at 21 MPG combined, so no year is better than another.
Did EPA ratings change during the 2004-2008 Pontiac Grand Prix?
Yes. Ratings changed in 2005, 2006 and 2008. In 2007 the values repeat the year before.
How does the 2004-2008 Pontiac Grand Prix compare with the previous generation?
The previous generation (2000-2003 Pontiac Grand Prix) is rated 19–21 MPG combined and costs $3,110–$4,230 a year to fuel; the 2004-2008 model is rated 19–21 MPG and costs $3,110–$4,230 a year.
How much does it cost to fuel a 2008 Pontiac Grand Prix per year?
Driving 15,000 miles a year at regular gasoline $4.36/gal (U.S. average, Sep 2026), the Grand Prix 3.8L 6-cyl FWD costs about $3,110 a year. Across all 2 configurations the cost runs $3,110–$4,230 a year. That is a $1,120 difference between the cheapest and the costliest configuration.
How much does it cost to drive a 2008 Pontiac Grand Prix 100 miles?
About $20.73 per 100 miles for the Grand Prix 3.8L 6-cyl FWD at regular gasoline $4.36/gal (U.S. average, Sep 2026), and between $20.73 and $28.20 across all configurations. That is the annual cost over 15,000 miles divided by 150.
Is the 2008 Pontiac Grand Prix more efficient in the city or on the highway?
The Grand Prix 3.8L 6-cyl FWD is rated 18 city and 28 highway MPG, so it is more efficient on the highway, by 10 MPG.
How does the 2008 Pontiac Grand Prix compare with other midsize car configurations?
The Grand Prix 3.8L 6-cyl FWD costs about $3,110 a year to fuel, $380 less than the class median of $3,490, and less than 6 of 10 midsize car configurations. The comparison covers all 158 rated midsize car configurations for MY2008, not weighted by sales.
Is the 2008 Pontiac Grand Prix different from the 2007 model?
The most efficient configuration stays at 21 MPG. Its annual cost stays at $3,110. EPA lists 2 configurations for 2008 against 4 configurations for 2007. See the 2007 Pontiac Grand Prix for that year.