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Ford Flex vs. Mercury Grand Marquis Fuel Economy (g/100m)

Chart is based on 390 fuel economy reports for the Ford Flex and 67 fuel economy reports for the Mercury Grand Marquis.

Ford Flex g/100m

Ford Flex Ford Flex 2014 31.7 MPG Highway Percentage 45 percent Ford Flex Ford Flex 2013 5.4 MPG Highway Percentage 60 percent Ford Flex Ford Flex 2013 5.6 MPG Highway Percentage 37 percent Ford Flex Ford Flex 2012 4.2 MPG Highway Percentage 59 percent Ford Flex Ford Flex 2011 15.2 MPG Highway Percentage 28 percent Ford Flex Ford Flex 2011 4.4 MPG Highway Percentage 25 percent Ford Flex Ford Flex 2011 5.6 MPG Highway Percentage 10 percent Ford Flex Ford Flex 2010 8.1 MPG Highway Percentage 61 percent Ford Flex Ford Flex 2010 4.7 MPG Highway Percentage 48 percent Ford Flex Ford Flex 2010 26.7 MPG Highway Percentage 67 percent Ford Flex Ford Flex 2009 6.2 MPG Highway Percentage 62 percent Ford Flex Ford Flex 2009 6.5 MPG Highway Percentage 22 percent
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 g/100m
2014 4dr SUV 287-horsepower 3.5L V6
6-speed shiftable automatic AWD		 flat light none 0 55 0 45 110 31.7  
2013 4dr SUV turbocharged 365hp 3.5L V6
6-speed shiftable automatic AWD		 flat med hvy 10 20 10 60 70 5.4  
2013 4dr SUV 287-horsepower 3.5L V6
6-speed shiftable automatic FWD		 flat light hvy 5 0 58 37 75 5.6  
2012 4dr SUV 262-horsepower 3.5L V6
6-speed automatic FWD		 flat med none 0 16 26 59 68 4.2  
2011 4dr SUV turbocharged 355hp 3.5L V6
6-speed shiftable automatic AWD		 flat med light 47 10 15 28 80 15.2  
2011 4dr SUV 262-horsepower 3.5L V6
6-speed automatic FWD		 flat light none 0 25 50 25 75 4.4  
2011 4dr SUV 262-horsepower 3.5L V6
6-speed automatic AWD		 flat light none 10 60 20 10 60 5.6  
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2010 4dr SUV turbocharged 355hp 3.5L V6
6-speed shiftable automatic AWD		 flat med none 6 10 23 61 73 8.1  
2010 4dr SUV 262-horsepower 3.5L V6
6-speed automatic FWD		 flat light none 5 23 25 48 66 4.7  
2010 4dr SUV 262-horsepower 3.5L V6
6-speed automatic AWD		 flat med none 0 33 0 67 100 26.7  
2009 4dr SUV 262-horsepower 3.5L V6
6-speed automatic FWD		 flat light light 2 13 23 62 70 6.2  
2009 4dr SUV 262-horsepower 3.5L V6
6-speed automatic AWD		 hills med light 4 36 38 22 68 6.5  

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This page shows only averages. See all the Ford Flex fuel economy data.

Mercury Grand Marquis g/100m

Mercury Grand Marquis Mercury Grand Marquis 2010 4.0 MPG Highway Percentage 90 percent Mercury Grand Marquis Mercury Grand Marquis 2009 5.3 MPG Highway Percentage 75 percent Mercury Grand Marquis Mercury Grand Marquis 2005 4.2 MPG Highway Percentage 75 percent Mercury Grand Marquis Mercury Grand Marquis 2004 3.9 MPG Highway Percentage 92 percent Mercury Grand Marquis Mercury Grand Marquis 2004 4.3 MPG Highway Percentage 30 percent Mercury Grand Marquis Mercury Grand Marquis 2003 4.6 MPG Highway Percentage 87 percent Mercury Grand Marquis Mercury Grand Marquis 2003 5.4 MPG Highway Percentage 40 percent Mercury Grand Marquis Mercury Grand Marquis 2002 4.5 MPG Highway Percentage 31 percent Mercury Grand Marquis Mercury Grand Marquis 2002 4.9 MPG Highway Percentage 10 percent Mercury Grand Marquis Mercury Grand Marquis 2000 4.6 MPG Highway Percentage 50 percent Mercury Grand Marquis Mercury Grand Marquis 2000 4.6 MPG Highway Percentage 55 percent
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 g/100m
2010 4dr Sedan 224-horsepower 4.6L V8
4-speed automatic RWD		 flat med light 0 0 10 90 70 4.0  
2009 4dr Sedan 224-horsepower 4.6L V8
4-speed automatic RWD		 flat med hvy 5 5 15 75 70 5.3  
2005 4dr Sedan 239-horsepower 4.6L V8
4-speed automatic RWD		 flat med none 5 5 15 75 60 4.2  
2004 4dr Sedan 239-horsepower 4.6L V8
4-speed automatic RWD		 flat med none 1 3 3 92 73 3.9  
2004 4dr Sedan 224-horsepower 4.6L V8
4-speed automatic RWD		 flat med light 5 5 60 30 70 4.3  
2003 4dr Sedan 239-horsepower 4.6L V8
4-speed automatic RWD		 flat med hvy 0 1 12 87 75 4.6  
2003 4dr Sedan 224-horsepower 4.6L V8
4-speed automatic RWD		 flat light light 15 26 19 40 68 5.4  
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2002 4dr Sedan 235-horsepower 4.6L V8
4-speed automatic RWD		 flat light light 22 23 23 31 60 4.5  
2002 4dr Sedan 220-horsepower 4.6L V8
4-speed automatic RWD		 flat light hvy 5 25 60 10 60 4.9  
2000 4dr Sedan 215-horsepower 4.6L V8
4-speed automatic RWD		 flat med hvy 0 0 50 50 70 4.6  
2000 4dr Sedan 200-horsepower 4.6L V8
4-speed automatic RWD		 flat light none 1 4 40 55 61 4.6  

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This page shows only averages. See all the Mercury Grand Marquis fuel economy data.

Ford Flex vs. Mercury Grand Marquis Fuel Economy (g/100m)

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 Ford Flex and Mercury Grand Marquis's where a car was driven. So you can get an idea of their real-world g/100m based on how and where you drive a car.

See TrueDelta's information for all SUVs
See TrueDelta's information for all Ford models and Mercury models.

What Our Members Are Saying about the Real Gas Mileage of the Ford Flex

Ford Flex Real Gas Mileage: Pros
YearBody/PowertrainComment
2010 4dr SUV 262-horsepower 3.5L V6
6-speed automatic FWD		 I am currently averaging 20 MPG overall with heavy highway use. For the size of vehicle I think that is rather reasonable. see full Ford Flex review
2010 4dr SUV 262-horsepower 3.5L V6
6-speed automatic FWD		 1000 miles of ownership so far, 21-22 mpg in light suburb and highway driving, 24-25 mpg on 500 mile trip (fuel economy measured by calculating miles driven divided by gallons of fuel purchased). see full Ford Flex review
2009 4dr SUV 262-horsepower 3.5L V6
6-speed automatic FWD		 Only driven around town, mileage 16.6, have never had it on the open road. see full Ford Flex review
2009 4dr SUV 262-horsepower 3.5L V6
6-speed automatic FWD		 Very good for a 4500 lb vehicle. see full Ford Flex review
 

What Our Members Are Saying about the Real Gas Mileage of the Mercury Grand Marquis

Mercury Grand Marquis Real Gas Mileage: Pros
YearBody/PowertrainComment
2008 4dr Sedan 224-horsepower 4.6L V8
4-speed automatic RWD		 Incredible- 21mpg city, 27mpg HWY see full Mercury Grand Marquis review
Mercury Grand Marquis Real Gas Mileage: Cons
YearBody/PowertrainComment
2005 4dr Sedan 239-horsepower 4.6L V8
4-speed automatic RWD		 The V-8 is thirsty for city driving. The extra power would be nice for highway & mountain driving, though. see full Mercury Grand Marquis review