MENU
1 0 3 4 3 4

We are 103,000+ car owners sharing real-world car information.

Join Us

Cadillac STS vs. Mercury Mariner MPG

Chart is based on 28 fuel economy reports for the Cadillac STS and 35 fuel economy reports for the Mercury Mariner.

Cadillac STS MPG

Cadillac STS Cadillac STS 2008 20.1 MPG Highway Percentage 90 percent Cadillac STS Cadillac STS 2008 21.8 MPG Highway Percentage 50 percent Cadillac STS Cadillac STS 2007 22.0 MPG Highway Percentage 28 percent Cadillac STS Cadillac STS 2006 24.5 MPG Highway Percentage 100 percent Cadillac STS Cadillac STS 2006 20.0 MPG Highway Percentage 60 percent Cadillac STS Cadillac STS 2006 19.0 MPG Highway Percentage 20 percent Cadillac STS Cadillac STS 2005 20.5 MPG Highway Percentage 53 percent Cadillac STS Cadillac STS 2005 14.6 MPG Highway Percentage 40 percent Cadillac STS Cadillac STS 2005 21.0 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 MPG
2008 4dr Sedan 320-horsepower 4.6L V8
6-speed shiftable automatic AWD		 flat v.lt light 0 10 0 90 60 20.1  
2008 4dr Sedan 302-horsepower 3.6L V6
6-speed shiftable automatic RWD		 flat med light 9 11 30 50 73 21.8  
2007 4dr Sedan 320-horsepower 4.6L V8
6-speed shiftable automatic RWD		 flat med light 3 50 20 28 70 22.0  
2006 4dr Sedan 320-horsepower 4.6L V8
5-speed shiftable automatic RWD		 mtns light none 0 0 0 100 65 24.5  
2006 4dr Sedan 254-horsepower 3.6L V6
5-speed shiftable automatic RWD		 flat med light 20 9 10 60 67 20.0  
2006 4dr Sedan 254-horsepower 3.6L V6
5-speed shiftable automatic AWD		 flat light none 0 45 35 20 60 19.0  
2005 4dr Sedan 320-horsepower 4.6L V8
5-speed shiftable automatic RWD		 flat med light 0 3 43 53 67 20.5  
Looking for a warranty? Get a quote.
2005 4dr Sedan 320-horsepower 4.6L V8
5-speed shiftable automatic AWD		 flat med light 10 45 5 40 70 14.6  
2005 4dr Sedan 255-horsepower 3.6L V6
5-speed shiftable automatic RWD		 flat light light 5 20 30 45 60 21.0  

Return to top

This page shows only averages. See all the Cadillac STS fuel economy data.

Mercury Mariner MPG

Mercury Mariner Mercury Mariner 2011 18.9 MPG Highway Percentage 10 percent Mercury Mariner Mercury Mariner 2009 20.6 MPG Highway Percentage 30 percent Mercury Mariner Mercury Mariner 2009 35.5 MPG Highway Percentage 44 percent Mercury Mariner Mercury Mariner 2009 32.3 MPG Highway Percentage 60 percent Mercury Mariner Mercury Mariner 2008 22.0 MPG Highway Percentage 25 percent Mercury Mariner Mercury Mariner 2008 21.4 MPG Highway Percentage 33 percent Mercury Mariner Mercury Mariner 2008 30.8 MPG Highway Percentage 23 percent Mercury Mariner Mercury Mariner 2007 23.4 MPG Highway Percentage 61 percent Mercury Mariner Mercury Mariner 2007 29.8 MPG Highway Percentage 18 percent Mercury Mariner Mercury Mariner 2006 23.1 MPG Highway Percentage 45 percent Mercury Mariner Mercury Mariner 2006 21.5 MPG Highway Percentage 75 percent Mercury Mariner Mercury Mariner 2006 30.6 MPG Highway Percentage 31 percent Mercury Mariner Mercury Mariner 2005 21.0 MPG Highway Percentage 15 percent Mercury Mariner Mercury Mariner 2005 22.3 MPG Highway Percentage 75 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 MPG
2011 4dr SUV 240-horsepower 3.0L V6
6-speed automatic FWD		 flat v.lt none 30 30 30 10 60 18.9  
2009 4dr SUV 240-horsepower 3.0L V6
6-speed automatic FWD		 flat light light 20 20 30 30 70 20.6  
2009 4dr SUV 153-horsepower 2.5L I4 Hybrid
CVT FWD		 flat light light 11 13 31 44 60 35.5  
2009 4dr SUV 153-horsepower 2.5L I4 Hybrid
CVT AWD		 flat med light 30 0 10 60 80 32.3  
2008 4dr SUV 200-horsepower 3.0L V6
4-speed automatic FWD		 flat light light 0 45 30 25 70 22.0  
2008 4dr SUV 200-horsepower 3.0L V6
4-speed automatic AWD		 flat light none 0 8 60 33 60 21.4  
2008 4dr SUV 133-horsepower 2.3L I4 Hybrid
CVT AWD		 flat light hvy 5 18 55 23 65 30.8  
Looking for a warranty? Get a quote.
2007 4dr SUV 200-horsepower 3.0L V6
4-speed automatic AWD		 flat light light 0 3 37 61 63 23.4  
2007 4dr SUV 133-horsepower 2.3L I4 Hybrid
CVT AWD		 flat light light 11 16 56 18 70 29.8  
2006 4dr SUV 200-horsepower 3.0L V6
4-speed automatic FWD		 flat light light 8 13 35 45 62 23.1  
2006 4dr SUV 200-horsepower 3.0L V6
4-speed automatic AWD		 flat med light 0 0 25 75 75 21.5  
2006 4dr SUV 133-horsepower 2.3L I4 Hybrid
CVT AWD		 hills light light 16 18 35 31 70 30.6  
2005 4dr SUV 200-horsepower 3.0L V6
4-speed automatic AWD		 flat light light 0 0 85 15 60 21.0  
2005 4dr SUV 153-horsepower 2.3L I4
4-speed automatic AWD		 flat v.lt light 3 13 8 75 67 22.3  

Return to top

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

Cadillac STS vs. Mercury Mariner 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 Cadillac STS and Mercury Mariner's where a car was driven. So you can get an idea of their real-world MPG 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 Mariner

Mercury Mariner Real Gas Mileage: Pros
YearBody/PowertrainComment
2010 0 171-horsepower 2.5L I4
6-speed automatic FWD		 getting 31 mpg highway see full Mercury Mariner review
2009 4dr SUV 171-horsepower 2.5L I4
6-speed automatic FWD		 Has been very good and getting better see full Mercury Mariner review
2009 4dr SUV 240-horsepower 3.0L V6
6-speed automatic FWD		 Coming from a Trailblazer, we like the average of 21-22 MPG in mixed driving, as were used to about 17 MPG. Fuel economy climbs toward the rated 26 MPG the more highway driving we do. see full Mercury Mariner review
2007 4dr SUV 200-horsepower 3.0L V6
4-speed automatic AWD		 For the first almost three years after we got the car, it gave 21+ mpg in town & 24+ mpg on the road. see full Mercury Mariner review
2005 4dr SUV 153-horsepower 2.3L I4
4-speed automatic AWD		 For an SUV with a 4cyl and 4wd I get avg of 22 MPG mixed city and highway. I usually get 23-26 on freeway only. This is good. see full Mercury Mariner review
Mercury Mariner Real Gas Mileage: Cons
YearBody/PowertrainComment
2007 4dr SUV 200-horsepower 3.0L V6
4-speed automatic AWD		 For some reason when new Michelin All Terrain tires with Nitrogen air replaced the Champions from the factory, it plummeted to 17 & 20 mpg. No explanation from Michelin, Costco or Ford/Mercury - they have no idea why. see full Mercury Mariner review