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Infiniti G vs. Infiniti M MPG

Chart is based on 677 fuel economy reports for the Infiniti G and 135 fuel economy reports for the Infiniti M.

Infiniti G MPG

Infiniti G Infiniti G 2013 22.2 MPG Highway Percentage 75 percent Infiniti G Infiniti G 2012 25.6 MPG Highway Percentage 100 percent Infiniti G Infiniti G 2012 23.7 MPG Highway Percentage 70 percent Infiniti G Infiniti G 2011 20.8 MPG Highway Percentage 42 percent Infiniti G Infiniti G 2011 21.8 MPG Highway Percentage 48 percent Infiniti G Infiniti G 2011 25.7 MPG Highway Percentage 75 percent Infiniti G Infiniti G 2010 25.3 MPG Highway Percentage 68 percent Infiniti G Infiniti G 2010 22.3 MPG Highway Percentage 52 percent Infiniti G Infiniti G 2010 23.0 MPG Highway Percentage 58 percent Infiniti G Infiniti G 2010 18.0 MPG Highway Percentage 5 percent Infiniti G Infiniti G 2010 25.6 MPG Highway Percentage 70 percent Infiniti G Infiniti G 2009 23.2 MPG Highway Percentage 58 percent Infiniti G Infiniti G 2009 18.6 MPG Highway Percentage 31 percent Infiniti G Infiniti G 2009 24.5 MPG Highway Percentage 91 percent Infiniti G Infiniti G 2009 20.6 MPG Highway Percentage 33 percent Infiniti G Infiniti G 2009 15.0 MPG Highway Percentage 10 percent Infiniti G Infiniti G 2009 19.5 MPG Highway Percentage 58 percent Infiniti G Infiniti G 2009 20.4 MPG Highway Percentage 70 percent Infiniti G Infiniti G 2009 20.7 MPG Highway Percentage 48 percent Infiniti G Infiniti G 2008 20.9 MPG Highway Percentage 62 percent Infiniti G Infiniti G 2008 20.5 MPG Highway Percentage 34 percent Infiniti G Infiniti G 2008 19.1 MPG Highway Percentage 49 percent Infiniti G Infiniti G 2008 20.6 MPG Highway Percentage 35 percent Infiniti G Infiniti G 2008 19.6 MPG Highway Percentage 40 percent Infiniti G Infiniti G 2007 21.0 MPG Highway Percentage 37 percent Infiniti G Infiniti G 2007 21.0 MPG Highway Percentage 49 percent Infiniti G Infiniti G 2007 18.5 MPG Highway Percentage 47 percent Infiniti G Infiniti G 2007 18.5 MPG Highway Percentage 50 percent Infiniti G Infiniti G 2007 11.3 MPG Highway Percentage 5 percent Infiniti G Infiniti G 2006 21.1 MPG Highway Percentage 43 percent Infiniti G Infiniti G 2006 20.0 MPG Highway Percentage 48 percent Infiniti G Infiniti G 2006 20.7 MPG Highway Percentage 55 percent Infiniti G Infiniti G 2006 20.2 MPG Highway Percentage 40 percent Infiniti G Infiniti G 2006 21.1 MPG Highway Percentage 56 percent Infiniti G Infiniti G 2005 24.0 MPG Highway Percentage 55 percent Infiniti G Infiniti G 2005 19.0 MPG Highway Percentage 30 percent Infiniti G Infiniti G 2005 19.0 MPG Highway Percentage 44 percent Infiniti G Infiniti G 2005 21.2 MPG Highway Percentage 26 percent Infiniti G Infiniti G 2005 22.9 MPG Highway Percentage 46 percent Infiniti G Infiniti G 2004 23.2 MPG Highway Percentage 73 percent Infiniti G Infiniti G 2004 21.3 MPG Highway Percentage 53 percent Infiniti G Infiniti G 2004 19.3 MPG Highway Percentage 41 percent Infiniti G Infiniti G 2004 18.9 MPG Highway Percentage 38 percent Infiniti G Infiniti G 2004 18.3 MPG Highway Percentage 21 percent Infiniti G Infiniti G 2004 19.0 MPG Highway Percentage 43 percent Infiniti G Infiniti G 2004 20.0 MPG Highway Percentage 70 percent Infiniti G Infiniti G 2003 24.5 MPG Highway Percentage 68 percent Infiniti G Infiniti G 2003 20.8 MPG Highway Percentage 47 percent Infiniti G Infiniti G 2003 18.1 MPG Highway Percentage 35 percent Infiniti G Infiniti G 2003 21.0 MPG Highway Percentage 49 percent Infiniti G Infiniti G 2003 24.7 MPG Highway Percentage 85 percent Infiniti G Infiniti G 2002 28.7 MPG Highway Percentage 20 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
2013 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat med light 3 12 10 75 70 22.2  
2012 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat light light 0 0 0 100 75 25.6  
2012 4dr Sedan 218-horsepower 2.5L V6
7-speed shiftable automatic AWD
flat light none 0 30 0 70 60 23.7  
2011 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat light light 9 24 25 42 66 20.8  
2011 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic AWD
flat med light 6 6 40 48 73 21.8  
2011 4dr Sedan 218-horsepower 2.5L V6
7-speed shiftable automatic RWD
flat med light 3 2 21 75 74 25.7  
2010 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat med light 8 17 8 68 106 25.3  
2010 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic AWD
flat med none 3 12 33 52 72 22.3  
2010 4dr Sedan 328-horsepower 3.7L V6
6-speed manual RWD
flat med light 7 28 7 58 73 23.0  
2010 2dr Hardtop conv. 325-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat lead none 5 10 80 5 60 18.0  
2010 2dr Coupe 330-horsepower 3.7L V6
7-speed shiftable automatic AWD
flat med none 4 13 13 70 80 25.6  
2009 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat med light 13 19 10 58 69 23.2  
2009 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic AWD
flat med light 6 30 34 31 63 18.6  
2009 4dr Sedan 328-horsepower 3.7L V6
6-speed manual RWD
flat light light 0 9 0 91 70 24.5  
2009 2dr Hardtop conv. 325-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat lead hvy 17 33 17 33 75 20.6  
2009 2dr Hardtop conv. 325-horsepower 3.7L V6
6-speed manual RWD
flat lead none 10 10 70 10 70 15.0  
2009 2dr Coupe 330-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat med light 10 20 12 58 73 19.5  
2009 2dr Coupe 330-horsepower 3.7L V6
7-speed shiftable automatic AWD
flat light light 10 10 10 70 61 20.4  
2009 2dr Coupe 330-horsepower 3.7L V6
6-speed manual RWD
hills med none 2 26 24 48 67 20.7  
2008 4dr Sedan 306-horsepower 3.5L V6
6-speed manual RWD
flat med hvy 5 14 20 62 79 20.9  
2008 4dr Sedan 306-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med light 10 23 33 34 73 20.5  
2008 4dr Sedan 306-horsepower 3.5L V6
5-speed shiftable automatic AWD
flat light light 12 14 26 49 68 19.1  
2008 2dr Coupe 330-horsepower 3.7L V6
6-speed manual RWD
flat light light 1 11 53 35 71 20.6  
2008 2dr Coupe 330-horsepower 3.7L V6
5-speed shiftable automatic RWD
flat lead light 9 29 22 40 74 19.6  
2007 4dr Sedan 306-horsepower 3.5L V6
6-speed manual RWD
flat med light 10 29 24 37 68 21.0  
2007 4dr Sedan 306-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med light 10 19 23 49 71 21.0  
2007 4dr Sedan 306-horsepower 3.5L V6
5-speed shiftable automatic AWD
flat med light 7 20 27 47 79 18.5  
2007 2dr Coupe 293-horsepower 3.5L V6
6-speed manual RWD
flat med none 5 25 20 50 70 18.5  
2007 2dr Coupe 275-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat lead hvy 0 93 3 5 70 11.3  
2006 4dr Sedan 298-horsepower 3.5L V6
6-speed manual RWD
flat med none 13 17 27 43 72 21.1  
2006 4dr Sedan 280-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med light 9 24 18 48 69 20.0  
2006 4dr Sedan 280-horsepower 3.5L V6
5-speed shiftable automatic AWD
flat light light 5 16 24 55 71 20.7  
2006 2dr Coupe 298-horsepower 3.5L V6
6-speed manual RWD
flat med light 8 29 23 40 65 20.2  
2006 2dr Coupe 280-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med light 7 16 21 56 69 21.1  
2005 4dr Sedan 298-horsepower 3.5L V6
6-speed manual RWD
flat med light 5 20 20 55 60 24.0  
2005 4dr Sedan 280-horsepower 3.5L V6
5-speed shiftable automatic RWD
hills med light 2 20 48 30 65 19.0  
2005 4dr Sedan 280-horsepower 3.5L V6
5-speed shiftable automatic AWD
flat med none 10 31 15 44 85 19.0  
2005 2dr Coupe 298-horsepower 3.5L V6
6-speed manual RWD
flat med light 8 24 42 26 70 21.2  
2005 2dr Coupe 280-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat light none 7 28 19 46 69 22.9  
2004 4dr Sedan 280-horsepower 3.5L V6
6-speed manual RWD
flat light none 10 10 8 73 98 23.2  
2004 4dr Sedan 260-horsepower 3.5L V6
6-speed manual RWD
flat med light 6 24 17 53 71 21.3  
2004 4dr Sedan 260-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med light 17 31 10 41 68 19.3  
2004 4dr Sedan 260-horsepower 3.5L V6
5-speed shiftable automatic AWD
flat light none 11 21 30 38 67 18.9  
2004 2dr Coupe 280-horsepower 3.5L V6
6-speed manual RWD
flat med light 12 36 31 21 66 18.3  
2004 2dr Coupe 280-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med none 28 18 10 43 63 19.0  
2004 2dr Coupe 260-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med none 10 10 10 70 60 20.0  
2003 4dr Sedan 260-horsepower 3.5L V6
6-speed manual RWD
hills light hvy 0 19 14 68 71 24.5  
2003 4dr Sedan 260-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med light 9 15 29 47 85 20.8  
2003 2dr Coupe 280-horsepower 3.5L V6
6-speed manual RWD
flat med light 11 28 26 35 92 18.1  
2003 2dr Coupe 280-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med light 5 23 23 49 70 21.0  
2003 2dr Coupe 260-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat light none 5 5 5 85 100 24.7  
2002 4dr Sedan 145-horsepower 2.0L I4
5-speed manual RWD
flat v.lt none 5 10 65 20 65 28.7  

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This page shows only averages. See all the Infiniti G fuel economy data.

Infiniti M MPG

Infiniti M Infiniti M 2013 22.8 MPG Highway Percentage 34 percent Infiniti M Infiniti M 2012 21.1 MPG Highway Percentage 42 percent Infiniti M Infiniti M 2012 22.1 MPG Highway Percentage 30 percent Infiniti M Infiniti M 2011 19.3 MPG Highway Percentage 25 percent Infiniti M Infiniti M 2011 18.4 MPG Highway Percentage 37 percent Infiniti M Infiniti M 2011 21.0 MPG Highway Percentage 40 percent Infiniti M Infiniti M 2011 20.0 MPG Highway Percentage 40 percent Infiniti M Infiniti M 2010 14.0 MPG Highway Percentage 40 percent Infiniti M Infiniti M 2010 22.0 MPG Highway Percentage 85 percent Infiniti M Infiniti M 2009 15.5 MPG Highway Percentage 65 percent Infiniti M Infiniti M 2009 22.0 MPG Highway Percentage 20 percent Infiniti M Infiniti M 2009 21.0 MPG Highway Percentage 30 percent Infiniti M Infiniti M 2008 17.0 MPG Highway Percentage 45 percent Infiniti M Infiniti M 2008 19.7 MPG Highway Percentage 45 percent Infiniti M Infiniti M 2008 20.0 MPG Highway Percentage 66 percent Infiniti M Infiniti M 2007 15.9 MPG Highway Percentage 23 percent Infiniti M Infiniti M 2007 19.8 MPG Highway Percentage 29 percent Infiniti M Infiniti M 2007 20.0 MPG Highway Percentage 35 percent Infiniti M Infiniti M 2006 19.3 MPG Highway Percentage 60 percent Infiniti M Infiniti M 2006 19.9 MPG Highway Percentage 39 percent Infiniti M Infiniti M 2006 19.0 MPG Highway Percentage 47 percent Infiniti M Infiniti M 2004 19.9 MPG Highway Percentage 35 percent Infiniti M Infiniti M 2003 18.4 MPG Highway Percentage 36 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
2013 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic AWD
hills light light 12 26 29 34 68 22.8  
2012 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic AWD
flat med light 3 23 32 42 80 21.1  
2012 4dr Sedan 302-horsepower 3.5L V6 Hybrid
7-speed shiftable automatic RWD
flat light hvy 0 50 20 30 80 22.1  
2011 4dr Sedan 420-horsepower 5.6L V8
7-speed shiftable automatic RWD
flat med hvy 35 35 5 25 75 19.3  
2011 4dr Sedan 420-horsepower 5.6L V8
7-speed shiftable automatic AWD
flat med light 7 31 25 37 67 18.4  
2011 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic RWD
flat med light 5 45 10 40 60 21.0  
2011 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic AWD
flat med light 5 24 30 40 70 20.0  
2010 4dr Sedan 325-horsepower 4.5L V8
5-speed shiftable automatic AWD
flat med none 10 10 40 40 75 14.0  
2010 4dr Sedan 303-horsepower 3.5L V6
7-speed shiftable automatic RWD
flat light hvy 0 3 12 85 70 22.0  
2009 4dr Sedan 325-horsepower 4.5L V8
5-speed shiftable automatic AWD
flat med light 6 14 15 65 69 15.5  
2009 4dr Sedan 303-horsepower 3.5L V6
7-speed shiftable automatic RWD
flat med light 0 0 80 20 60 22.0  
2009 4dr Sedan 303-horsepower 3.5L V6
5-speed shiftable automatic AWD
hills med light 20 40 10 30 65 21.0  
2008 4dr Sedan 325-horsepower 4.5L V8
5-speed shiftable automatic RWD
flat lead hvy 35 15 5 45 75 17.0  
2008 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med light 21 17 18 45 67 19.7  
2008 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic AWD
hills med light 9 10 15 66 68 20.0  
2007 4dr Sedan 325-horsepower 4.5L V8
5-speed shiftable automatic RWD
flat med light 4 35 38 23 70 15.9  
2007 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat light light 20 28 23 29 71 19.8  
2007 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic AWD
flat med light 2 21 42 35 68 20.0  
2006 4dr Sedan 335-horsepower 4.5L V8
5-speed shiftable automatic RWD
flat light light 10 13 17 60 73 19.3  
2006 4dr Sedan 280-horsepower 3.5L V6
5-speed shiftable automatic RWD
flat med light 9 28 23 39 68 19.9  
2006 4dr Sedan 280-horsepower 3.5L V6
5-speed shiftable automatic AWD
flat med light 9 17 26 47 75 19.0  
2004 4dr Sedan 340-horsepower 4.5L V8
5-speed shiftable automatic RWD
hills med light 13 8 45 35 78 19.9  
2003 4dr Sedan 340-horsepower 4.5L V8
5-speed shiftable automatic RWD
flat med light 13 33 17 36 78 18.4  

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This page shows only averages. See all the Infiniti M fuel economy data.

Infiniti G vs. Infiniti M 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 Infiniti G and Infiniti M'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 Infiniti models.

What Our Members Are Saying about the Real Gas Mileage of the Infiniti G

Infiniti G Real Gas Mileage: Pros
YearBody/PowertrainComment
2007 4dr Sedan 306-horsepower 3.5L V6
5-speed shiftable automatic AWD
My average for the life of the car is 21MPG. Not too bad for a car with this power and my lead foot. see full Infiniti G review
Infiniti G Real Gas Mileage: Cons
YearBody/PowertrainComment
2013 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic RWD
Can live with it because of the performance, but wish the mileage was better and premium fuel was not required. see full Infiniti G review
2010 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic AWD
To be honest, it is exactly what I expected, so no real beefs with it. That said, if you are looking for a car that gets better than 19 or so combined, this is not it. Decent freeway miles (24-27/g) but in city it is hard to beat 16/g. see full Infiniti G review
2010 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic AWD
Fuel economy is poor - about 19 MPG average. see full Infiniti G review
2009 2dr Coupe 330-horsepower 3.7L V6
7-speed shiftable automatic RWD
You do not buy a performance car and expect to get good gas mileage. At a 5 mpg or greater difference from my last car, it is taking some getting used too. see full Infiniti G review
2009 2dr Coupe 330-horsepower 3.7L V6
7-speed shiftable automatic AWD
average 18 in town 24 highway. see full Infiniti G review
2009 4dr Sedan 328-horsepower 3.7L V6
7-speed shiftable automatic AWD
With such a large displaced engine and so much power you will find that you will have so-so mpg if you drive mainly in the city like I do. Especially if you are a "spirited" driver like I tend to be. I am averaging about 14-16mpg 95% city. On the highway its a different story. I have averaged up to 28mpg @ 78mph, I kind of wish I drove more on the highway. see full Infiniti G review
2008 4dr Sedan 306-horsepower 3.5L V6
6-speed manual RWD
While not terrible, ~20mpg is by no means phenomenal. Relatively comparable cars get ~23-27mpg, but typically also have smaller engines which explains a good portion of the difference. see full Infiniti G review
2008 4dr Sedan 306-horsepower 3.5L V6
5-speed shiftable automatic AWD
Takes a lot of fuel... 14L/100km about. see full Infiniti G review
2008 4dr Sedan 306-horsepower 3.5L V6
5-speed shiftable automatic RWD
Not too great. My average is 19 - 20 mpg, mostly city. see full Infiniti G review
2008 4dr Sedan 306-horsepower 3.5L V6
5-speed shiftable automatic RWD
The car is just not about fuel economy. You pay for performance. I get ~18 in suburb style driving and ~23 on highway but that maybe just me. see full Infiniti G review
 

What Our Members Are Saying about the Real Gas Mileage of the Infiniti M

Infiniti M Real Gas Mileage: Pros
YearBody/PowertrainComment
2011 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic AWD
Fuel economy is abysmal around town. I guess that's the price you pay for going grocery shopping with over 300 HP. However, on the highway it's very possible to exceed the EPA mileage number. see full Infiniti M review
2006 4dr Sedan 335-horsepower 4.5L V8
5-speed shiftable automatic RWD
V8 power--it's a gas guzzler and could've used an extra 1 or 2 speeds more since it revs so high at highway speeds. see full Infiniti M review
2006 4dr Sedan 335-horsepower 4.5L V8
5-speed shiftable automatic RWD
78,000 miles primarily city driving and rarely use AC-16.9 mpg. 4.5 L V8 great power train with RWD-great fun to drive. see full Infiniti M review
Infiniti M Real Gas Mileage: Cons
YearBody/PowertrainComment
2012 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic AWD
I get around 17 city/25 highway. Not impressive but this is not why you buy a car like this. see full Infiniti M review
2011 4dr Sedan 420-horsepower 5.6L V8
7-speed shiftable automatic AWD
Fairly poor. see full Infiniti M review
2011 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic RWD
I get average about 22 MPG with 80% of highway driving, this is with baby footing of the car, in town and climbing the hill, the milage can drop to 18-19. see full Infiniti M review
2008 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic RWD
needs a 6th gear, since there is too much revving in 5th gear while cruising. they put a 6th gear in the 2009 version see full Infiniti M review
2008 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic AWD
Gas mileage stinks. see full Infiniti M review
2008 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic RWD
average 21 hwy see full Infiniti M review
2007 4dr Sedan 325-horsepower 4.5L V8
5-speed shiftable automatic RWD
Averages about 18.5 mpg in mixed suburban/urban/freeway driving. Can get thirsty when you get on the gas, but duh... see full Infiniti M review
2007 4dr Sedan 325-horsepower 4.5L V8
5-speed shiftable automatic RWD
16.9 in city traffice 18.nothing on the highway...blah! see full Infiniti M review
2007 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic AWD
Large cars get poor milage. 18-20 mpg would like an option to trade some performance for added MPG. see full Infiniti M review
2006 4dr Sedan 280-horsepower 3.5L V6
5-speed shiftable automatic RWD
About 19-20 mpg overall with premium fuel... could be better. see full Infiniti M review