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Infiniti M vs. Mazda RX-8 Fuel Economy (L/100km)

Chart is based on 136 fuel economy reports for the Infiniti M and 202 fuel economy reports for the Mazda RX-8.

Infiniti M L/100km

Infiniti M Infiniti M 2013 10.4 MPG Highway Percentage 34 percent Infiniti M Infiniti M 2012 11.4 MPG Highway Percentage 42 percent Infiniti M Infiniti M 2012 10.6 MPG Highway Percentage 30 percent Infiniti M Infiniti M 2011 12.3 MPG Highway Percentage 25 percent Infiniti M Infiniti M 2011 12.9 MPG Highway Percentage 37 percent Infiniti M Infiniti M 2011 11.2 MPG Highway Percentage 40 percent Infiniti M Infiniti M 2011 12.0 MPG Highway Percentage 40 percent Infiniti M Infiniti M 2010 16.8 MPG Highway Percentage 40 percent Infiniti M Infiniti M 2010 10.7 MPG Highway Percentage 85 percent Infiniti M Infiniti M 2009 15.3 MPG Highway Percentage 65 percent Infiniti M Infiniti M 2009 10.7 MPG Highway Percentage 20 percent Infiniti M Infiniti M 2009 11.2 MPG Highway Percentage 30 percent Infiniti M Infiniti M 2008 13.8 MPG Highway Percentage 45 percent Infiniti M Infiniti M 2008 12.0 MPG Highway Percentage 45 percent Infiniti M Infiniti M 2008 11.9 MPG Highway Percentage 66 percent Infiniti M Infiniti M 2007 15.2 MPG Highway Percentage 23 percent Infiniti M Infiniti M 2007 12.1 MPG Highway Percentage 29 percent Infiniti M Infiniti M 2007 11.8 MPG Highway Percentage 35 percent Infiniti M Infiniti M 2006 12.2 MPG Highway Percentage 60 percent Infiniti M Infiniti M 2006 12.0 MPG Highway Percentage 39 percent Infiniti M Infiniti M 2006 12.6 MPG Highway Percentage 47 percent Infiniti M Infiniti M 2006 15.2 MPG Highway Percentage 10 percent Infiniti M Infiniti M 2004 11.9 MPG Highway Percentage 35 percent Infiniti M Infiniti M 2003 12.9 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 L/100km
2013 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic AWD		 hills light light 12 26 29 34 68 10.4  
2012 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic AWD		 flat med light 3 23 32 42 80 11.4  
2012 4dr Sedan 302-horsepower 3.5L V6 Hybrid
7-speed shiftable automatic RWD		 flat light hvy 0 50 20 30 80 10.6  
2011 4dr Sedan 420-horsepower 5.6L V8
7-speed shiftable automatic RWD		 flat med hvy 35 35 5 25 75 12.3  
2011 4dr Sedan 420-horsepower 5.6L V8
7-speed shiftable automatic AWD		 flat med light 7 31 25 37 67 12.9  
2011 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic RWD		 flat med light 5 45 10 40 60 11.2  
2011 4dr Sedan 330-horsepower 3.7L V6
7-speed shiftable automatic AWD		 flat med light 5 24 30 40 70 12.0  
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2010 4dr Sedan 325-horsepower 4.5L V8
5-speed shiftable automatic AWD		 flat med none 10 10 40 40 75 16.8  
2010 4dr Sedan 303-horsepower 3.5L V6
7-speed shiftable automatic RWD		 flat light hvy 0 3 12 85 70 10.7  
2009 4dr Sedan 325-horsepower 4.5L V8
5-speed shiftable automatic AWD		 flat med light 6 14 15 65 69 15.3  
2009 4dr Sedan 303-horsepower 3.5L V6
7-speed shiftable automatic RWD		 flat med light 0 0 80 20 60 10.7  
2009 4dr Sedan 303-horsepower 3.5L V6
5-speed shiftable automatic AWD		 hills med light 20 40 10 30 65 11.2  
2008 4dr Sedan 325-horsepower 4.5L V8
5-speed shiftable automatic RWD		 flat lead hvy 35 15 5 45 75 13.8  
2008 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic RWD		 flat med light 21 17 18 45 67 12.0  
2008 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic AWD		 hills med light 9 10 15 66 68 11.9  
2007 4dr Sedan 325-horsepower 4.5L V8
5-speed shiftable automatic RWD		 flat med light 4 35 38 23 70 15.2  
2007 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic RWD		 flat light light 20 28 23 29 71 12.1  
2007 4dr Sedan 275-horsepower 3.5L V6
5-speed shiftable automatic AWD		 flat med light 2 21 42 35 68 11.8  
2006 4dr Sedan 335-horsepower 4.5L V8
5-speed shiftable automatic RWD		 flat light light 10 13 17 60 73 12.2  
2006 4dr Sedan 280-horsepower 3.5L V6
5-speed shiftable automatic RWD		 flat med light 9 28 23 39 68 12.0  
2006 4dr Sedan 280-horsepower 3.5L V6
5-speed shiftable automatic AWD		 flat med light 9 17 26 47 75 12.6  
2006 0 280-horsepower 3.5L V6
5-speed shiftable automatic AWD		 flat light hvy 5 55 30 10 110 15.2  
2004 4dr Sedan 340-horsepower 4.5L V8
5-speed shiftable automatic RWD		 hills med light 13 8 45 35 78 11.9  
2003 4dr Sedan 340-horsepower 4.5L V8
5-speed shiftable automatic RWD		 flat med light 13 33 17 36 78 12.9  

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

Mazda RX-8 L/100km

Mazda RX-8 Mazda RX-8 2010 13.9 MPG Highway Percentage 55 percent Mazda RX-8 Mazda RX-8 2009 13.5 MPG Highway Percentage 53 percent Mazda RX-8 Mazda RX-8 2008 11.3 MPG Highway Percentage 67 percent Mazda RX-8 Mazda RX-8 2007 12.9 MPG Highway Percentage 33 percent Mazda RX-8 Mazda RX-8 2007 10.8 MPG Highway Percentage 51 percent Mazda RX-8 Mazda RX-8 2006 12.8 MPG Highway Percentage 67 percent Mazda RX-8 Mazda RX-8 2006 13.6 MPG Highway Percentage 3 percent Mazda RX-8 Mazda RX-8 2005 13.1 MPG Highway Percentage 60 percent Mazda RX-8 Mazda RX-8 2004 13.8 MPG Highway Percentage 44 percent Mazda RX-8 Mazda RX-8 2004 13.7 MPG Highway Percentage 23 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
2010 4dr Coupe 232-horsepower 1.3L R2
6-speed manual RWD		 flat med light 1 22 22 55 74 13.9  
2009 4dr Coupe 232-horsepower 1.3L R2
6-speed manual RWD		 flat med none 2 16 29 53 68 13.5  
2008 4dr Coupe 232-horsepower 1.3L R2
6-speed manual RWD		 flat med light 3 16 15 67 72 11.3  
2007 4dr Coupe 232-horsepower 1.3L R2
6-speed manual RWD		 flat med none 5 14 48 33 79 12.9  
2007 4dr Coupe 212-horsepower 1.3L R2
6-speed shiftable automatic RWD		 flat med light 15 24 10 51 78 10.8  
2006 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 flat med none 9 10 13 67 66 12.8  
2006 4dr Coupe 212-horsepower 1.3L R2
6-speed shiftable automatic RWD		 flat med light 5 28 65 3 60 13.6  
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2005 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 flat med light 6 16 18 60 77 13.1  
2004 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 flat med light 7 25 24 44 77 13.8  
2004 4dr Coupe 197-horsepower 1.3L R2
4-speed shiftable automatic RWD		 flat lead light 42 12 23 23 70 13.7  

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This page shows only averages. See all the Mazda RX-8 fuel economy data.

Infiniti M vs. Mazda RX-8 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 Infiniti M and Mazda RX-8'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 Infiniti models and Mazda models.

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 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
2011 4dr Sedan 420-horsepower 5.6L V8
7-speed shiftable automatic AWD		 Fairly poor. 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
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
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 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 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		 Often avergaed as low as 16mpg on a tank-full of gas. see full Infiniti M review
 

What Our Members Are Saying about the Real Gas Mileage of the Mazda RX-8

Mazda RX-8 Real Gas Mileage: Cons
YearBody/PowertrainComment
2009 4dr Coupe 232-horsepower 1.3L R2
6-speed manual RWD		 One of the big downsides of the rotary is truly horrendous fuel economy. When the RX-8 first came out in the early 2000s, its mileage ratings of 16/22 city/highway mpg (stick shift) were just barely acceptable, but there days, with many crossovers hitting more than 30 mpg on the highway, those figures are truly atrocious, especially given respectable but certainly not neck-snapping power. Futhermore, it takes premium. If you're using the RX-8 as it commuter, fuel costs will add up quickly. In my predominantly around-town driving, I typically average between 16-17 mpg. My highest recorded average was 20 mpg on a highway trip at speeds around 75 mph. see full Mazda RX-8 review
2007 4dr Coupe 212-horsepower 1.3L R2
6-speed shiftable automatic RWD		 The EPA numbers are way low compared with my real-world experience. The window sticker showed 18/25 and I have never seen less than 23 with my 40/60 city/highway commute. I think Mazda should develop a lean-burn economy cruise mode for this car. see full Mazda RX-8 review
2006 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 Lite bit to high consumption when I drive it in normal speed. On full woot its ok. see full Mazda RX-8 review
2005 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 Worst fuel economy in its class. see full Mazda RX-8 review
2004 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 Not that bad for what it is, but it seems to me that Mazda's Sky Active technology could help the city mileage. It just needs more R&D. see full Mazda RX-8 review
2004 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 At 16 m.p.g. on premium grade these days it could be cheaper to take a taxi. see full Mazda RX-8 review
2004 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 For a small engine displacement and a relatively light vehicle weight, the gas mileage is weak. I usualy get around 19mpg, and that does not realy matter if I am doing all city or all highway driving. I think the real problem is in the sixth gear it isnt much different than fifth gear so it does not provide good fuel economy. see full Mazda RX-8 review
2004 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 For a car with a 1.9 liter engine I would have expected better than 16-19 MPG. Get your foot into it and the numbers fall drastically. Otherwise I loved that car. It just got too small with a newborn and a big dog. see full Mazda RX-8 review
2004 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 I gets 20MPG no matter what I do. Running around 20. 1/2 highway 20. All the highway all day 25-26. I think that it could do better. see full Mazda RX-8 review
2004 4dr Coupe 238-horsepower 1.3L R2
6-speed manual RWD		 16-18MPG city, 24MPG highway see full Mazda RX-8 review