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|2010||2010 4dr Sedan 224-hp 4.6L V8 4-sp automatic RWD||25.3||
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|With the 224-horsepower 4.6L V8 engine, 4-speed automatic transmission, and rear-wheel drive, the 2010 Mercury Grand Marquis has been averaging 25.3 MPG (miles per gallon).
The 2010 Mercury Grand Marquiss in this analysis were driven mostly on the highway at an average speed of 70 miles per hour (about 90 percent of the miles driven). The rest of the miles were in the suburbs (0 percent), in the city (0 percent), and in heavy traffic (0 percent).
In addition, the average 2010 Mercury Grand Marquis in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.