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Mercury Grand Marquis Gas Mileage (MPG)

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 MPG based on how and where you drive a car.

Reported MPG

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If you are not a TrueDelta member, you can see only five Mercury Grand Marquis MPG averages for each powertrain. Log in or join us to see them all.

Mercury Grand Marquis Gas Mileage

Year Body/Powertrain flat, hilly, or mountainousLand driving style: very light to "lead foot"Foot A/C use: none to heavyA/C constant stop and goTraf % many stops per mileCity % stop every mile or twoSub % fairly steady speedHwy % Hwy Spd MPG
2010 4dr Sedan 224-horsepower 4.6L V8
4-speed automatic RWD
flat med light 0 0 10 90 70 25.3
2010 4dr Sedan 224-horsepower 4.6L V8
4-speed automatic RWD
flat med light 0 0 10 90 70 25.3  
  Averages flat med light 0 0 10 90 70 25.3
With the 224-horsepower 4.6L V8 engine, 4-speed automatic transmission, and rear-wheel drive, 2010 Mercury Grand Marquis fuel economy 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 (10 percent), in heavy traffic (0 percent), and in the city (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.
 
Year Body/Powertrain flat, hilly, or mountainousLand driving style: very light to "lead foot"Foot A/C use: none to heavyA/C constant stop and goTraf % many stops per mileCity % stop every mile or twoSub % fairly steady speedHwy % Hwy Spd MPG
2009 4dr Sedan 224-horsepower 4.6L V8
4-speed automatic RWD
flat med hvy 5 5 15 75 70 19.0
2009 4dr Sedan 224-horsepower 4.6L V8
4-speed automatic RWD
flat med hvy 5 5 15 75 70 19.0  
  Averages flat med hvy 5 5 15 75 70 19.0
With the 224-horsepower 4.6L V8 engine, 4-speed automatic transmission, and rear-wheel drive, the 2009 Mercury Grand Marquis has been averaging 19.0 MPG (miles per gallon).

The 2009 Mercury Grand Marquiss in this analysis were driven mostly on the highway at an average speed of 70 miles per hour (about 75 percent of the miles driven). The rest of the miles were in the suburbs (15 percent), in heavy traffic (5 percent), and in the city (5 percent).

In addition the average 2009 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.
 
Year Body/Powertrain flat, hilly, or mountainousLand driving style: very light to "lead foot"Foot A/C use: none to heavyA/C constant stop and goTraf % many stops per mileCity % stop every mile or twoSub % fairly steady speedHwy % Hwy Spd MPG
2005 4dr Sedan 239-horsepower 4.6L V8
4-speed automatic RWD
flat med none 5 5 15 75 60 23.8
2005 4dr Sedan 239-horsepower 4.6L V8
4-speed automatic RWD
flat med none 5 5 15 75 60 23.8  
  Averages flat med none 5 5 15 75 60 23.8
With the 239-horsepower 4.6L V8 engine, 4-speed automatic transmission, and rear-wheel drive, 2005 Mercury Grand Marquis gas mileage has been averaging 23.8 MPG (miles per gallon).

The 2005 Mercury Grand Marquiss in this analysis were driven mostly on the highway at an average speed of 60 miles per hour (about 75 percent of the miles driven). The rest of the miles were in the suburbs (15 percent), in heavy traffic (5 percent), and in the city (5 percent).

In addition the average 2005 Mercury Grand Marquis in this analysis was driven on flat terrain with a medium foot and the AC not used at all.
 
Year Body/Powertrain flat, hilly, or mountainousLand driving style: very light to "lead foot"Foot A/C use: none to heavyA/C constant stop and goTraf % many stops per mileCity % stop every mile or twoSub % fairly steady speedHwy % Hwy Spd MPG
2004 4dr Sedan 239-horsepower 4.6L V8
4-speed automatic RWD
flat med none 0 2 3 95 75 25.3
  flat med none 0 2 0 98 75 26.3
  flat med none 0 5 5 90 75 24.2
  flat med none 0 1 0 99 75 27.7
  flat med none 0 5 5 90 70 23.8
2004 4dr Sedan 239-horsepower 4.6L V8
4-speed automatic RWD
flat med none 0 3 3 94 74 25.5  
  Averages flat med none 0 3 3 94 74 25.5
With the 239-horsepower 4.6L V8 engine, 4-speed automatic transmission, and rear-wheel drive, 2004 Mercury Grand Marquis fuel economy has been averaging 25.5 MPG (miles per gallon).

The 2004 Mercury Grand Marquiss in this analysis were driven mostly on the highway at an average speed of 74 miles per hour (about 94 percent of the miles driven). The rest of the miles were in the city (3 percent), in the suburbs (3 percent), and in heavy traffic (0 percent).

In addition the average 2004 Mercury Grand Marquis in this analysis was driven on flat terrain with a medium foot and the AC not used at all.
 
Year Body/Powertrain flat, hilly, or mountainousLand driving style: very light to "lead foot"Foot A/C use: none to heavyA/C constant stop and goTraf % many stops per mileCity % stop every mile or twoSub % fairly steady speedHwy % Hwy Spd MPG
2004 4dr Sedan 224-horsepower 4.6L V8
4-speed automatic RWD
flat med light 5 5 60 30 70 23.4
2004 4dr Sedan 224-horsepower 4.6L V8
4-speed automatic RWD
flat med light 5 5 60 30 70 23.4  
  Averages flat med light 5 5 60 30 70 23.4
With the 224-horsepower 4.6L V8 engine, 4-speed automatic transmission, and rear-wheel drive, the 2004 Mercury Grand Marquis has been averaging 23.4 MPG (miles per gallon).

The 2004 Mercury Grand Marquiss in this analysis were driven mostly in the suburbs (about 60 percent of the miles driven). The rest of the miles were on the highway at an average speed of 70 miles per hour (30 percent), in heavy traffic (5 percent), and in the city (5 percent).

In addition the average 2004 Mercury Grand Marquis in this analysis was driven on flat terrain with a medium foot and the AC on only some of the time.
 
Year Body/Powertrain flat, hilly, or mountainousLand driving style: very light to "lead foot"Foot A/C use: none to heavyA/C constant stop and goTraf % many stops per mileCity % stop every mile or twoSub % fairly steady speedHwy % Hwy Spd MPG
2003 4dr Sedan 239-horsepower 4.6L V8
4-speed automatic RWD
flat med hvy 0 1 12 87 75 21.8
2003 4dr Sedan 239-horsepower 4.6L V8
4-speed automatic RWD
flat med hvy 0 1 12 87 75 21.8  
  Averages flat med hvy 0 1 12 87 75 21.8
With the 239-horsepower 4.6L V8 engine, 4-speed automatic transmission, and rear-wheel drive, 2003 Mercury Grand Marquis gas mileage has been averaging 21.8 MPG (miles per gallon).

The 2003 Mercury Grand Marquiss in this analysis were driven mostly on the highway at an average speed of 75 miles per hour (about 87 percent of the miles driven). The rest of the miles were in the suburbs (12 percent), in the city (1 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.
 
Year Body/Powertrain flat, hilly, or mountainousLand driving style: very light to "lead foot"Foot A/C use: none to heavyA/C constant stop and goTraf % many stops per mileCity % stop every mile or twoSub % fairly steady speedHwy % Hwy Spd MPG
2003 4dr Sedan 224-horsepower 4.6L V8
4-speed automatic RWD
flat light none 5 50 30 15 70 18.2
  flat light none 0 55 40 5 70 16.3
  flat light hvy 0 1 1 99 65 18.1
  flat med light 50 0 0 50 65 18.0
  flat med hvy 20 24 24 32 70 22.0
2003 4dr Sedan 224-horsepower 4.6L V8
4-speed automatic RWD
flat light light 15 26 19 40 68 18.5  
  Averages flat light light 15 26 19 40 68 18.5
With the 224-horsepower 4.6L V8 engine, 4-speed automatic transmission, and rear-wheel drive, 2003 Mercury Grand Marquis fuel economy has been averaging 18.5 MPG (miles per gallon).

The 2003 Mercury Grand Marquiss in this analysis were driven mostly on the highway at an average speed of 68 miles per hour (about 40 percent of the miles driven). The rest of the miles were in the city (26 percent), in the suburbs (19 percent), and in heavy traffic (15 percent).

In addition the average 2003 Mercury Grand Marquis in this analysis was driven on flat terrain with a light foot and the AC on only some of the time.
 
Year Body/Powertrain flat, hilly, or mountainousLand driving style: very light to "lead foot"Foot A/C use: none to heavyA/C constant stop and goTraf % many stops per mileCity % stop every mile or twoSub % fairly steady speedHwy % Hwy Spd MPG
2002 4dr Sedan 235-horsepower 4.6L V8
4-speed automatic RWD
flat light light 22 23 23 31 60 22.0
2002 4dr Sedan 235-horsepower 4.6L V8
4-speed automatic RWD
flat light light 22 23 23 31 60 22.0  
  Averages flat light light 22 23 23 31 60 22.0
With the 239-horsepower 4.6L V8 engine, 4-speed automatic transmission, and rear-wheel drive, the 2002 Mercury Grand Marquis has been averaging 22.0 MPG (miles per gallon).

The 2002 Mercury Grand Marquiss in this analysis were driven mostly on the highway at an average speed of 60 miles per hour (about 31 percent of the miles driven). The rest of the miles were in the city (23 percent), in the suburbs (23 percent), and in heavy traffic (22 percent).

In addition the average 2002 Mercury Grand Marquis in this analysis was driven on flat terrain with a light foot and the AC on only some of the time.
 
Year Body/Powertrain flat, hilly, or mountainousLand driving style: very light to "lead foot"Foot A/C use: none to heavyA/C constant stop and goTraf % many stops per mileCity % stop every mile or twoSub % fairly steady speedHwy % Hwy Spd MPG
2002 4dr Sedan 220-horsepower 4.6L V8
4-speed automatic RWD
flat light hvy 5 25 60 10 60 20.3
2002 4dr Sedan 220-horsepower 4.6L V8
4-speed automatic RWD
flat light hvy 5 25 60 10 60 20.3  
  Averages flat light hvy 5 25 60 10 60 20.3
With the 224-horsepower 4.6L V8 engine, 4-speed automatic transmission, and rear-wheel drive, 2002 Mercury Grand Marquis gas mileage has been averaging 20.3 MPG (miles per gallon).

The 2002 Mercury Grand Marquiss in this analysis were driven mostly in the suburbs (about 60 percent of the miles driven). The rest of the miles were in the city (25 percent), on the highway at an average speed of 60 miles per hour (10 percent), and in heavy traffic (5 percent).

In addition the average 2002 Mercury Grand Marquis in this analysis was driven on flat terrain with a light foot and the AC on most or all of the time.
 
Year Body/Powertrain flat, hilly, or mountainousLand driving style: very light to "lead foot"Foot A/C use: none to heavyA/C constant stop and goTraf % many stops per mileCity % stop every mile or twoSub % fairly steady speedHwy % Hwy Spd MPG
2000 4dr Sedan 215-horsepower 4.6L V8
4-speed automatic RWD
flat light hvy 0 0 50 50 70 22.9
2000 4dr Sedan 215-horsepower 4.6L V8
4-speed automatic RWD
flat light hvy 0 0 50 50 70 22.9  
  Averages flat light hvy 0 0 50 50 70 22.9
With the 239-horsepower 4.6L V8 engine, 4-speed automatic transmission, and rear-wheel drive, 2000 Mercury Grand Marquis fuel economy has been averaging 22.9 MPG (miles per gallon).

The 2000 Mercury Grand Marquiss in this analysis were driven mostly on the highway at an average speed of 70 miles per hour (about 50 percent of the miles driven). The rest of the miles were in the suburbs (50 percent), in heavy traffic (0 percent), and in the city (0 percent).

In addition the average 2000 Mercury Grand Marquis in this analysis was driven on flat terrain with a light foot and the AC on most or all of the time.
 
Year Body/Powertrain flat, hilly, or mountainousLand driving style: very light to "lead foot"Foot A/C use: none to heavyA/C constant stop and goTraf % many stops per mileCity % stop every mile or twoSub % fairly steady speedHwy % Hwy Spd MPG
2000 4dr Sedan 200-horsepower 4.6L V8
4-speed automatic RWD
flat light none 5 15 20 60 60 20.0
  flat med light 0 0 50 50 65 19.0
  flat light none 0 0 0 100 60 26.0
  flat light none 0 0 90 10 60 22.5
2000 4dr Sedan 200-horsepower 4.6L V8
4-speed automatic RWD
flat light none 1 4 40 55 61 21.9  
  Averages flat light none 1 4 40 55 61 21.9
With the 224-horsepower 4.6L V8 engine, 4-speed automatic transmission, and rear-wheel drive, the 2000 Mercury Grand Marquis has been averaging 21.9 MPG (miles per gallon).

The 2000 Mercury Grand Marquiss in this analysis were driven mostly on the highway at an average speed of 61 miles per hour (about 55 percent of the miles driven). The rest of the miles were in the suburbs (40 percent), in the city (4 percent), and in heavy traffic (1 percent).

In addition the average 2000 Mercury Grand Marquis in this analysis was driven on flat terrain with a light foot and the AC not used at all.

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What Our Members Are Saying about the Real Mercury Grand Marquis MPG

Mercury Grand Marquis Fuel Economy: Pros
Year Body/Powertrain Comment
2008 4dr Sedan 224-hp 4.6L V8 4-sp automatic RWD Incredible- 21mpg city, 27mpg HWY
Mercury Grand Marquis Fuel Economy: Cons
Year Body/Powertrain Comment
2005 4dr Sedan 239-hp 4.6L V8 4-sp automatic RWD The V-8 is thirsty for city driving. The extra power would be nice for highway & mountain driving, though.