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Cadillac STS vs. Mercury Grand Marquis Fuel Economy (g/100m)

Chart is based on 28 fuel economy reports for the Cadillac STS and 67 fuel economy reports for the Mercury Grand Marquis.

Cadillac STS g/100m

Cadillac STS Cadillac STS 2008 5.0 MPG Highway Percentage 90 percent Cadillac STS Cadillac STS 2008 4.6 MPG Highway Percentage 50 percent Cadillac STS Cadillac STS 2007 4.6 MPG Highway Percentage 28 percent Cadillac STS Cadillac STS 2006 4.1 MPG Highway Percentage 100 percent Cadillac STS Cadillac STS 2006 5.2 MPG Highway Percentage 60 percent Cadillac STS Cadillac STS 2006 5.3 MPG Highway Percentage 20 percent Cadillac STS Cadillac STS 2005 4.9 MPG Highway Percentage 53 percent Cadillac STS Cadillac STS 2005 23.5 MPG Highway Percentage 40 percent Cadillac STS Cadillac STS 2005 4.8 MPG Highway Percentage 45 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
2008 4dr Sedan 320-horsepower 4.6L V8
6-speed shiftable automatic AWD		 flat v.lt light 0 10 0 90 60 5.0  
2008 4dr Sedan 302-horsepower 3.6L V6
6-speed shiftable automatic RWD		 flat med light 9 11 30 50 73 4.6  
2007 4dr Sedan 320-horsepower 4.6L V8
6-speed shiftable automatic RWD		 flat med light 3 50 20 28 70 4.6  
2006 4dr Sedan 320-horsepower 4.6L V8
5-speed shiftable automatic RWD		 mtns light none 0 0 0 100 65 4.1  
2006 4dr Sedan 254-horsepower 3.6L V6
5-speed shiftable automatic RWD		 flat med light 20 9 10 60 67 5.2  
2006 4dr Sedan 254-horsepower 3.6L V6
5-speed shiftable automatic AWD		 flat light none 0 45 35 20 60 5.3  
2005 4dr Sedan 320-horsepower 4.6L V8
5-speed shiftable automatic RWD		 flat med light 0 3 43 53 67 4.9  
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2005 4dr Sedan 320-horsepower 4.6L V8
5-speed shiftable automatic AWD		 flat med light 10 45 5 40 70 23.5  
2005 4dr Sedan 255-horsepower 3.6L V6
5-speed shiftable automatic RWD		 flat light light 5 20 30 45 60 4.8  

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This page shows only averages. See all the Cadillac STS 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.

Cadillac STS 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 Cadillac STS 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 Sedans
See TrueDelta's information for all Cadillac models and Mercury models.

What Our Members Are Saying about the Real Gas Mileage of the Cadillac STS

Cadillac STS Real Gas Mileage: Cons
YearBody/PowertrainComment
2006 4dr Sedan 320-horsepower 4.6L V8
5-speed shiftable automatic RWD		 16 city/21 highway. Buy it only if you can afford it with out complaining. see full Cadillac STS review
2005 4dr Sedan 320-horsepower 4.6L V8
5-speed shiftable automatic AWD		 This car is thirsty. I live in flat country and I get 15 mpg with 80% highway traffic. I only get 19 mpg on trips. It probably needs a 6th speed overdive for the highway. see full Cadillac STS 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