Pontiac averages 22.8 mpg combined across 28 petrol and diesel models (1984–2010). The best on record does 42 mpg, the thirstiest 17 — a yearly fuel gap of about $1,345.
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 | 22.8 mpg |
| Fuel per year | $1,684 |
| Most frugal on record | 42 mpg — $914 a year |
| Thirstiest on record | 17 mpg — $2,259 a year |
Pontiac models by gas mileage
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 | $1,692 | |
| Pontiac Solstice | 23 / 21 | $1,745 | |
| Pontiac Grand Prix | 22 / 17 | $1,910 | |
| Pontiac Aztek | 20 / 19 | $1,939 | |
| Pontiac Bonneville | 21 / 17 | $1,969 | |
| Pontiac Torrent | 20 / 19 | $1,969 | |
| Pontiac Montana | 20 / 18 | $1,979 | |
| Pontiac Monterey | 19 / 19 | $2,021 | |
| Pontiac G8 | 20 / 18 | $2,021 | |
| Pontiac Trans Sport | 19 / 18 | $2,098 | |
| Pontiac GTO | 19 / 18 | $2,098 |
MPG is a number. Dollars per year is the answer.
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How we count
Pontiac rests on 312 EPA ratings covering 28 models from 1984 to 2010. The laboratory numbers are EPA's and go in unchanged; the money is ours, at 12,000 miles a year and $3.20 a gallon. Full method.
Frequently asked questions
What is the average Pontiac gas mileage?
22.8 mpg combined across 28 models and 312 EPA ratings, from 1984 to 2010 — 26 model years in one figure, which is why it sits below what a new Pontiac does today.
Which Pontiac model is the most economical?
The Pontiac G3 at 30.0 mpg, about $1,280 a year in fuel, against the GTO at 18.3 mpg and $2,098 — a gap of $818 a year between the two ends of the same badge.
How much does a Pontiac cost to run?
About $1,684 a year in fuel, at 12,000 miles and $3.20 a gallon. Over five years that is $8,420, before a single service.
Why does the Pontiac average look low?
Because it spans 26 model years, back to 1984. Cars built before the mid-2000s were markedly thirstier, and Pontiac has 312 ratings from that whole stretch — the recent ones are pulled down by the old.
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