Pontiac averages 22.4 mpg combined across 17 models (1995–2010). The best on record does 30 mpg, the thirstiest 18 — a yearly fuel gap of about $853.
What that actually costs
What a Pontiac costs to feed, at 12,000 miles a year and $3.20 a gallon.
| Measure | Value |
|---|---|
| Average combined | 22.4 mpg |
| Fuel per year | $1,714 |
| Most frugal on record | 30 mpg — $1,280 a year |
| Thirstiest on record | 18 mpg — $2,133 a year |
Pontiac models by fuel economy
From the most frugal down. The yearly figure is what the fuel actually costs at 12,000 miles.
| Model | Average mpg | Best / Worst engine | Fuel per year |
|---|---|---|---|
| Pontiac G3 | 30 / 30 | $1,280 | |
| Pontiac G5 | 30 / 25 | $1,347 | |
| Pontiac Vibe | 29 / 28 | $1,347 | |
| Pontiac Wave | 30 / 26 | $1,386 | |
| Pontiac Sunfire | 27 / 24 | $1,518 | |
| Pontiac G6 | 26 / 21 | $1,627 | |
| Pontiac Grand Am | 27 / 20 | $1,707 | |
| Pontiac Solstice | 23 / 21 | $1,745 | |
| Pontiac Grand Prix | 21 / 19 | $1,873 | |
| Pontiac Bonneville | 21 / 18 | $1,910 | |
| Pontiac Aztek | 20 / 19 | $1,939 | |
| Pontiac Torrent | 20 / 19 | $1,969 | |
| Pontiac Montana | 20 / 18 | $1,990 | |
| Pontiac Monterey | 19 / 19 | $2,021 | |
| Pontiac G8 | 20 / 18 | $2,021 | |
| Pontiac GTO | 19 / 18 | $2,098 | |
| Pontiac Trans Sport | 18 / 18 | $2,133 |
MPG is a number. Dollars per year is the answer.
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How we count
Fuel-economy figures come from EPA fueleconomy.gov — the same laboratory numbers printed on the window sticker. We don't adjust them; real-world consumption depends on how and where you drive.
What we add is money. Yearly cost assumes 12,000 miles at $3.20 a gallon — change either and the ranking stays, only the size of the bill moves. Cost per mile is the same figure divided out, useful when comparing a commute against a weekend car.
Frequently asked questions
What is the average Pontiac mpg?
22.4 mpg combined across 17 models rated between 1995 and 2010. That averages everything the brand has offered, so a long history of trucks pulls it down.
Which Pontiac model is the most economical?
See the table above — models are sorted from the most frugal down, with what each costs in fuel per year.
How much does a Pontiac cost to run?
About $1,714 a year in fuel on average, at 12,000 miles and $3.20 a gallon.
Why does the average look low for a modern brand?
Because it covers every model year on record, back to the 1980s. Cars built before the mid-2000s were markedly thirstier — that era is included.