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With the engine, transmission, and rear-wheel drive, the Pontiac Grand Prix has been averaging MPG (miles per gallon). All Grand Prix models have quite impressive fuel economy ratings. The base Grand Prix is rated at 30 mpg highway, and the V8 manages to get 18 city, 27 highway. Depending on trim level, the Pontiac Grand Prix gas mileage is from miles per gallon ( liters per km) to 25 miles per gallon ( liters per.
Based on data from 44 vehicles, 2, fuel-ups and , miles of driving, the Pontiac Grand Prix gets a combined Avg MPG of with a MPG margin. The transmission had to be rebuilt on one of them at , miles the other one is around , miles was well worth it they get great fuel mileage if they'. View detailed gas mileage data for the Pontiac Grand Prix. Use our handy tool to get estimated annual fuel costs based on your driving habits.