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Mercury Grand Marquis Fuel Economy (km/L)

km/L Number of Vehicles
38 kilometers per liter 1 vehicles
39 kilometers per liter 0 vehicles
40 kilometers per liter 0 vehicles
41 kilometers per liter 0 vehicles
42 kilometers per liter 1 vehicles
43 kilometers per liter 2 vehicles
44 kilometers per liter 0 vehicles
45 kilometers per liter 0 vehicles
46 kilometers per liter 0 vehicles
47 kilometers per liter 0 vehicles
48 kilometers per liter 0 vehicles
49 kilometers per liter 0 vehicles
50 kilometers per liter 0 vehicles
51 kilometers per liter 1 vehicles
52 kilometers per liter 1 vehicles
Model Year Body/Powertrain km/L  
2003 2003 4dr Sedan 239-hp 4.6L V8 4-sp automatic RWD 51.3
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With the 178 kilowatts 4.6L V8 engine, 4-speed automatic transmission, and rear-wheel drive, the 2003 Mercury Grand Marquis has been averaging 51.3 L/100km (liters per 100 kilometers).

The 2003 Mercury Grand Marquiss in this analysis were driven mostly on the highway at an average speed of 75 kilometers per hour (about 87 percent of the kilometers driven). The rest of the kilometers were in the city (1 percent), in the suburbs (0 percent), and in heavy traffic (0 percent).

In addition, the average 2003 Mercury Grand Marquis in this analysis was driven on flat terrain with a medium foot and the AC on most or all of the time.
2003 2003 4dr Sedan 224-hp 4.6L V8 4-sp automatic RWD 43.54
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2003 Mercury Grand Marquis Gas Mileage (km/L)

Unlike other fuel economy surveys, TrueDelta's Real-World Gas Mileage Survey includes questions about how and where a car was driven. So you can get an idea of the Mercury Grand Marquis's real-world km/L based on how and where you drive a car.