Infiniti M vs. Mazda RX-8 MPG

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

Infiniti M MPG

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
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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	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
2006	0 280-horsepower 3.5L V6 5-speed shiftable automatic AWD	flat	light	hvy	5	55	30	10	110	15.4
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.

Mazda RX-8 MPG

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
2010	4dr Coupe 232-horsepower 1.3L R2 6-speed manual RWD	flat	med	light	1	22	22	55	74	17.1
2009	4dr Coupe 232-horsepower 1.3L R2 6-speed manual RWD	flat	med	none	2	16	29	53	68	17.5
2008	4dr Coupe 232-horsepower 1.3L R2 6-speed manual RWD	flat	med	light	3	16	15	67	72	20.9
2007	4dr Coupe 232-horsepower 1.3L R2 6-speed manual RWD	flat	med	none	5	14	48	33	79	18.4
2007	4dr Coupe 212-horsepower 1.3L R2 6-speed shiftable automatic RWD	flat	med	light	15	24	10	51	78	22.5
2006	4dr Coupe 238-horsepower 1.3L R2 6-speed manual RWD	flat	med	none	9	10	13	67	66	19.1
2006	4dr Coupe 212-horsepower 1.3L R2 6-speed shiftable automatic RWD	flat	med	light	5	28	65	3	60	17.3
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2005	4dr Coupe 238-horsepower 1.3L R2 6-speed manual RWD	flat	med	light	6	16	18	60	77	18.6
2004	4dr Coupe 238-horsepower 1.3L R2 6-speed manual RWD	flat	med	light	7	25	24	44	77	17.5
2004	4dr Coupe 197-horsepower 1.3L R2 4-speed shiftable automatic RWD	flat	lead	light	42	12	23	23	70	17.3

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

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

Infiniti M Real Gas Mileage: Pros
Year	Body/Powertrain	Comment
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
Year	Body/Powertrain	Comment
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
Year	Body/Powertrain	Comment
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