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|2005||2005 4dr Sedan 205-hp 3.8L V6 4-sp automatic FWD||26.2||
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|With the 205-horsepower 3.8L V6 engine, 4-speed automatic transmission, and front-wheel drive, the 2005 Pontiac Bonneville has been averaging 26.2 MPG (miles per gallon).
The 2005 Pontiac Bonnevilles in this analysis were driven mostly on the highway at an average speed of 67 miles per hour (about 79 percent of the miles driven). The rest of the miles were in the city (6 percent), in heavy traffic (4.3 percent), and in the suburbs (0 percent).
In addition, the average 2005 Pontiac Bonneville in this analysis was driven on flat terrain with a medium foot and the AC not used at all.