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|2003||2003 4dr Sedan supercharged 240hp 3.8L V6 4-sp automatic FWD||22||
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|With the 275-horsepower 4.6L V8 engine, 4-speed automatic transmission, and front-wheel drive, the 2003 Pontiac Bonneville has been averaging 22 MPG (miles per gallon).
The 2003 Pontiac Bonnevilles in this analysis were driven mostly in the city (about 20 percent of the miles driven). The rest of the miles were in heavy traffic (10 percent), on the highway at an average speed of 60 miles per hour (10 percent), and in the suburbs (0 percent).
In addition, the average 2003 Pontiac Bonneville in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.