Pontiac G8 MPG by year — every rating on record
The Pontiac G8 has a combined EPA fuel economy rating for 2 model years, from 2008 to 2009. Across those years its best rated version returned 20 mpg (2008) and its thirstiest returned 15 mpg (2009). The EPA record holds 6 configurations for this nameplate, most recently a Large Cars.
Year-by-year EPA ratings
| Model year | Configurations | Best combined | Worst combined | Class rank that year | Drivetrains | Fuel | EPA class |
|---|---|---|---|---|---|---|---|
| 2008 | 2 | 20 mpg | 18 mpg | #10 of 44 (79th pct) | Rear-Wheel Drive | Premium, Regular | Large Cars |
| 2009 | 4 | 20 mpg | 15 mpg | #12 of 45 (75th pct) | Rear-Wheel Drive | Regular | Large Cars |
Where it has stood in its class
Ranked against every other nameplate the EPA filed under the same class that year. The Pontiac G8 placed highest in 2008 at #10 of 44, and lowest in 2009 at #12 of 45. It spent 2 of its 2 ranked years in the top half of its class.
Every configuration on record
All 6 configurations EPA lists for this nameplate, newest first.
| Year | Configuration | Engine detail | City | Highway | Combined | Gallons/yr | Barrels/yr | EPA fuel cost/yr | CO2 g/mi | GHG |
|---|---|---|---|---|---|---|---|---|---|---|
| 2009 | 6.2L 8-cyl Rear-Wheel Drive Automatic (S6) Regular | 6.2L 8-cyl | 13 | 20 | 15 | 766.7 | 19.8 | $4,150 | 592.4666666666667 | n/a |
| 2009 | 6.2L 8-cyl Rear-Wheel Drive Manual 6-spd Regular | 6.2L 8-cyl | 13 | 20 | 15 | 766.7 | 19.8 | $4,150 | 592.4666666666667 | n/a |
| 2009 | 6.0L 8-cyl Rear-Wheel Drive Automatic (S6) Regular | 6.0L 8-cyl | 15 | 24 | 18 | 638.9 | 16.5 | $3,450 | 493.72222222222223 | n/a |
| 2009 | 3.6L 6-cyl Rear-Wheel Drive Automatic (S5) Regular | 3.6L 6-cyl | 17 | 25 | 20 | 575.0 | 14.9 | $3,100 | 444.35 | n/a |
| 2008 | 6.0L 8-cyl Rear-Wheel Drive Automatic (S6) Premium | 6.0L 8-cyl | 15 | 24 | 18 | 638.9 | 16.5 | $4,300 | 493.72222222222223 | n/a |
| 2008 | 3.6L 6-cyl Rear-Wheel Drive Automatic (S5) Regular | 3.6L 6-cyl | 17 | 25 | 20 | 575.0 | 14.9 | $3,100 | 444.35 | n/a |
What G8 fuel costs over a year
At the EPA's 11,500 miles a year, the 2009 Pontiac G8 burns 575 to 767 gallons depending on configuration. Below is what that costs at three pump prices, and how much more the thirstiest configuration costs than the most efficient one.
| Pump price | Most efficient | Thirstiest | Spread |
|---|---|---|---|
| $3.00/gal | $1,725 | $2,300 | $575 |
| $3.50/gal | $2,013 | $2,683 | $671 |
| $4.00/gal | $2,300 | $3,067 | $767 |
EPA’s own estimate for the 2009 model year is $3,100 to $4,150 a year in fuel, or $4,250 more than the average new vehicle over five years.
How it compares with other Large Cars
Across the 305 nameplates EPA classifies as Large Cars, the median best combined rating is 21 mpg. At 20 mpg the Pontiac G8 is 1 mpg below the median, which is worth about $96 a year at $3.50 a gallon.
- All Large Cars rankings — every nameplate in the class, best to worst.
Other Pontiac nameplates
Every Pontiac model compared → — all nameplates ranked by best combined rating, with what each one costs a year.