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Porsche Boxster vs. Mercedes-Benz GL Fuel Economy (L/100km)

Chart is based on 102 fuel economy reports for the Porsche Boxster and 48 fuel economy reports for the Mercedes-Benz GL.

Porsche Boxster L/100km

Porsche Boxster Porsche Boxster 2013 11.4 MPG Highway Percentage 80 percent Porsche Boxster Porsche Boxster 2011 14.7 MPG Highway Percentage 50 percent Porsche Boxster Porsche Boxster 2010 11.3 MPG Highway Percentage 38 percent Porsche Boxster Porsche Boxster 2010 9.8 MPG Highway Percentage 75 percent Porsche Boxster Porsche Boxster 2008 11.1 MPG Highway Percentage 27 percent Porsche Boxster Porsche Boxster 2008 11.0 MPG Highway Percentage 3 percent Porsche Boxster Porsche Boxster 2007 9.4 MPG Highway Percentage 80 percent Porsche Boxster Porsche Boxster 2007 14.7 MPG Highway Percentage 4 percent Porsche Boxster Porsche Boxster 2007 9.0 MPG Highway Percentage 55 percent Porsche Boxster Porsche Boxster 2006 11.1 MPG Highway Percentage 63 percent Porsche Boxster Porsche Boxster 2005 10.8 MPG Highway Percentage 48 percent Porsche Boxster Porsche Boxster 2005 14.3 MPG Highway Percentage 75 percent Porsche Boxster Porsche Boxster 2005 9.1 MPG Highway Percentage 70 percent Porsche Boxster Porsche Boxster 2005 9.2 MPG Highway Percentage 50 percent Porsche Boxster Porsche Boxster 2005 9.9 MPG Highway Percentage 43 percent Porsche Boxster Porsche Boxster 2004 11.6 MPG Highway Percentage 48 percent Porsche Boxster Porsche Boxster 2004 9.1 MPG Highway Percentage 80 percent Porsche Boxster Porsche Boxster 2004 11.2 MPG Highway Percentage 25 percent Porsche Boxster Porsche Boxster 2004 9.3 MPG Highway Percentage 47 percent Porsche Boxster Porsche Boxster 2003 10.9 MPG Highway Percentage 38 percent Porsche Boxster Porsche Boxster 2003 9.0 MPG Highway Percentage 50 percent Porsche Boxster Porsche Boxster 2003 8.4 MPG Highway Percentage 50 percent Porsche Boxster Porsche Boxster 2002 9.9 MPG Highway Percentage 47 percent Porsche Boxster Porsche Boxster 2002 8.0 MPG Highway Percentage 40 percent Porsche Boxster Porsche Boxster 2002 14.7 MPG Highway Percentage 51 percent Porsche Boxster Porsche Boxster 2002 10.1 MPG Highway Percentage 64 percent Porsche Boxster Porsche Boxster 2001 11.2 MPG Highway Percentage 52 percent Porsche Boxster Porsche Boxster 2001 10.3 MPG Highway Percentage 35 percent Porsche Boxster Porsche Boxster 2000 10.9 MPG Highway Percentage 55 percent Porsche Boxster Porsche Boxster 2000 8.1 MPG Highway Percentage 30 percent Porsche Boxster Porsche Boxster 2000 9.9 MPG Highway Percentage 34 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 L/100km
2013 2dr Convertible 315-horsepower 3.4L H6
7-speed automated manual RWD		 flat med hvy 0 20 0 80 70 11.4  
2011 2dr Convertible 255-horsepower 2.9L H6
6-speed manual RWD		 flat med light 0 15 35 50 70 14.7  
2010 2dr Convertible 310-horsepower 3.4L H6
6-speed manual RWD		 flat med none 0 38 25 38 75 11.3  
2010 2dr Convertible 255-horsepower 2.9L H6
7-speed automated manual RWD		 hills med light 5 20 0 75 85 9.8  
2008 2dr Convertible 295-horsepower 3.4L H6
6-speed manual RWD		 flat med none 9 18 47 27 69 11.1  
2008 2dr Convertible 245-horsepower 2.7L H6
5-speed manual RWD		 flat med light 0 50 48 3 75 11.0  
2007 2dr Convertible 295-horsepower 3.4L H6
6-speed manual RWD		 flat med none 1 1 18 80 73 9.4  
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2007 2dr Convertible 245-horsepower 2.7L H6
5-speed shiftable automatic RWD		 flat med none 32 32 32 4 60 14.7  
2007 2dr Convertible 245-horsepower 2.7L H6
5-speed manual RWD		 flat med light 2 3 40 55 62 9.0  
2006 2dr Convertible 280-horsepower 3.2L H6
6-speed manual RWD		 flat lead light 6 11 22 63 65 11.1  
2005 2dr Convertible 280-horsepower 3.2L H6
6-speed manual RWD		 flat med light 9 11 32 48 69 10.8  
2005 2dr Convertible 280-horsepower 3.2L H6
5-speed shiftable automatic RWD		 flat lead hvy 0 25 0 75 80 14.3  
2005 2dr Convertible 240-horsepower 2.7L H6
6-speed manual RWD		 flat med none 10 10 10 70 65 9.1  
2005 2dr Convertible 240-horsepower 2.7L H6
5-speed shiftable automatic RWD		 flat light light 0 5 45 50 65 9.2  
2005 2dr Convertible 240-horsepower 2.7L H6
5-speed manual RWD		 hills med light 12 18 28 43 63 9.9  
2004 2dr Convertible 264-horsepower 3.2L H6
6-speed manual RWD		 flat med light 8 28 18 48 65 11.6  
2004 2dr Convertible 258-horsepower 3.2L H6
6-speed manual RWD		 flat med hvy 0 15 5 80 65 9.1  
2004 2dr Convertible 258-horsepower 3.2L H6
5-speed shiftable automatic RWD		 flat lead hvy 20 30 25 25 70 11.2  
2004 2dr Convertible 228-horsepower 2.7L H6
5-speed manual RWD		 hills med light 1 3 50 47 65 9.3  
2003 2dr Convertible 258-horsepower 3.2L H6
6-speed manual RWD		 hills med none 12 12 38 38 61 10.9  
2003 2dr Convertible 258-horsepower 3.2L H6
5-speed shiftable automatic RWD		 flat med light 0 50 0 50 70 9.0  
2003 2dr Convertible 228-horsepower 2.7L H6
5-speed manual RWD		 flat light none 25 0 25 50 60 8.4  
2002 2dr Convertible 250-horsepower 3.2L H6
6-speed manual RWD		 flat med light 15 15 24 47 65 9.9  
2002 2dr Convertible 250-horsepower 3.2L H6
5-speed shiftable automatic RWD		 flat light light 25 25 10 40 100 8.0  
2002 2dr Convertible 217-horsepower 2.7L H6
5-speed shiftable automatic RWD		 flat med light 10 29 10 51 70 14.7  
2002 2dr Convertible 217-horsepower 2.7L H6
5-speed manual RWD		 hills lead none 3 5 29 64 60 10.1  
2001 2dr Convertible 250-horsepower 3.2L H6
6-speed manual RWD		 hills lead light 13 22 13 52 68 11.2  
2001 2dr Convertible 217-horsepower 2.7L H6
5-speed manual RWD		 flat med none 15 15 35 35 70 10.3  
2000 2dr Convertible 250-horsepower 3.2L H6
6-speed manual RWD		 hills med light 5 17 23 55 93 10.9  
2000 2dr Convertible 217-horsepower 2.7L H6
5-speed shiftable automatic RWD		 flat med none 10 10 50 30 60 8.1  
2000 2dr Convertible 217-horsepower 2.7L H6
5-speed manual RWD		 flat med none 5 18 44 34 70 9.9  

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This page shows only averages. See all the Porsche Boxster fuel economy data.

Mercedes-Benz GL L/100km

Mercedes-Benz GL Mercedes-Benz GL 2014 8.6 MPG Highway Percentage 80 percent Mercedes-Benz GL Mercedes-Benz GL 2011 15.7 MPG Highway Percentage 30 percent Mercedes-Benz GL Mercedes-Benz GL 2010 9.9 MPG Highway Percentage 46 percent Mercedes-Benz GL Mercedes-Benz GL 2009 10.7 MPG Highway Percentage 27 percent Mercedes-Benz GL Mercedes-Benz GL 2009 13.1 MPG Highway Percentage 30 percent Mercedes-Benz GL Mercedes-Benz GL 2008 10.7 MPG Highway Percentage 41 percent Mercedes-Benz GL Mercedes-Benz GL 2008 13.9 MPG Highway Percentage 30 percent Mercedes-Benz GL Mercedes-Benz GL 2008 14.0 MPG Highway Percentage 35 percent Mercedes-Benz GL Mercedes-Benz GL 2007 9.4 MPG Highway Percentage 64 percent Mercedes-Benz GL Mercedes-Benz GL 2007 14.8 MPG Highway Percentage 42 percent Mercedes-Benz GL Mercedes-Benz GL 2007 13.7 MPG Highway Percentage 38 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 L/100km
2014 4dr SUV turbocharged 240hp 3.0L V6 Diesel
7-speed shiftable automatic AWD		 flat light light 1 4 15 80 65 8.6  
2011 4dr SUV 382-horsepower 5.5L V8
7-speed shiftable automatic AWD		 flat light hvy 1 49 20 30 70 15.7  
2010 4dr SUV turbocharged 210hp 3.0L V6 Diesel
7-speed shiftable automatic AWD		 flat light light 7 13 34 46 64 9.9  
2009 4dr SUV turbocharged 210hp 3.0L V6 Diesel
7-speed shiftable automatic AWD		 flat med hvy 0 13 60 27 72 10.7  
2009 4dr SUV 335-horsepower 4.7L V8
7-speed shiftable automatic AWD		 flat med light 21 22 27 30 60 13.1  
2008 4dr SUV turbocharged 215hp 3.0L V6 Diesel
7-speed shiftable automatic AWD		 flat light light 6 23 31 41 71 10.7  
2008 4dr SUV 335-horsepower 4.7L V8
7-speed shiftable automatic AWD w/low range		 flat med hvy 13 30 28 30 83 13.9  
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2008 4dr SUV 335-horsepower 4.7L V8
7-speed shiftable automatic AWD		 flat med none 21 21 23 35 85 14.0  
2007 4dr SUV turbocharged 215hp 3.0L V6 Diesel
7-speed shiftable automatic AWD		 hills light light 3 12 22 64 67 9.4  
2007 4dr SUV 335-horsepower 4.7L V8
7-speed shiftable automatic AWD w/low range		 hills med light 15 21 22 42 60 14.8  
2007 4dr SUV 335-horsepower 4.7L V8
7-speed shiftable automatic AWD		 flat med light 9 16 38 38 65 13.7  

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This page shows only averages. See all the Mercedes-Benz GL fuel economy data.

Porsche Boxster vs. Mercedes-Benz GL Fuel Economy (L/100km)

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 Porsche Boxster and Mercedes-Benz GL's where a car was driven. So you can get an idea of their real-world L/100km based on how and where you drive a car.

See TrueDelta's information for all Porsche models and Mercedes-Benz models.

What Our Members Are Saying about the Real Gas Mileage of the Porsche Boxster

Porsche Boxster Real Gas Mileage: Pros
YearBody/PowertrainComment
2002 2dr Convertible 217-horsepower 2.7L H6
5-speed shiftable automatic RWD		 mileage with performance see full Porsche Boxster review
2002 2dr Convertible 217-horsepower 2.7L H6
5-speed manual RWD		 Running the hills mostly safe speeds,and an occasional sprint or push through the corners I average 25 mpg/29 hwy.I think on a long boring drive possibly 32mpg see full Porsche Boxster review
 

TrueDelta Reviews the Real Gas Mileage of the Mercedes-Benz GL

Mercedes-Benz GL Real Gas Mileage: Pros
YearComment
2013 In the EPA's fuel economy tests the Mercedes-Benz GL350 BlueTEC rates 19 mpg city and 26 mpg highway. We observed low 20s in casual suburban driving (a few mpg lower with a heavy foot, a few mpg higher with a very light one) and 25.5 on our trip to Chicago and back (which included some heavy urban driving and 70-mph highways). These numbers don't seem so great, given that the GL350 burns diesel? Consider that the GL-Class is not only wide and tall but also very heavy, at nearly 5,500 pounds unloaded. The gas-powered GL450 is rated 14/19. Our family vehicle, a Ford Taurus X that weighs over 1,000 pounds less than the Mercedes, struggles to crack 22 on the highway. The Audi Q7 rates the same in city driving, and a couple mpg better on the highway. Since the GL350 is almost in another class size-wise, I'm calling this one a draw. Multiply this fuel economy by a 26.4-gallon tank, and the GL350 can go quite far between $100+ fill-ups. Is it really possible to drive the nearly 300 miles to Chicago--and then back--on one tank? Yes it is, with nearly a quarter-tank to spare. (Is it possible to do this without any of three kids needing to stop for a bathroom break? To our even greater surprise, yes to this as well. They were busy watching the $1,950 dual-screen entertainment system.) see full Mercedes-Benz GL review
 

What Our Members Are Saying about the Real Gas Mileage of the Mercedes-Benz GL

Mercedes-Benz GL Real Gas Mileage: Pros
YearBody/PowertrainComment
2010 4dr SUV turbocharged 210hp 3.0L V6 Diesel
7-speed shiftable automatic AWD		 For a large, seven passenger SUV it can deliver upwards of 28 mpg on the highway. see full Mercedes-Benz GL review
2008 4dr SUV turbocharged 215hp 3.0L V6 Diesel
7-speed shiftable automatic AWD		 25 mpg highway fuel efficiency for a large 7 passenger SUV is fantastic see full Mercedes-Benz GL review
2008 4dr SUV turbocharged 215hp 3.0L V6 Diesel
7-speed shiftable automatic AWD		 Diesel provides 25 MPG on the highway see full Mercedes-Benz GL review
Mercedes-Benz GL Real Gas Mileage: Cons
YearBody/PowertrainComment
2010 4dr SUV 335-horsepower 4.7L V8
7-speed shiftable automatic AWD		 15 mpg average. premium fuel. see full Mercedes-Benz GL review