Mercedes-Benz M-Class vs. Mazda RX-8 MPG

Chart is based on 47 fuel economy reports for the Mercedes-Benz M-Class and 202 fuel economy reports for the Mazda RX-8.

Mercedes-Benz M-Class 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 SUV turbocharged 240hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	flat	light	hvy	7	21	16	56	65	29.1
2012	4dr SUV turbocharged 240hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	hills	light	none	0	5	15	80	64	29.0
2011	4dr SUV turbocharged 210hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	flat	light	light	10	10	60	20	60	24.0
2010	4dr SUV turbocharged 228hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	hills	med	light	5	10	50	35	100	21.8
2010	4dr SUV turbocharged 210hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	flat	med	none	1	5	25	69	70	26.6
2010	4dr SUV 382-horsepower 5.5L V8 7-speed shiftable automatic AWD	flat	med	hvy	17	15	15	54	70	19.7
2009	4dr SUV turbocharged 210hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	flat	light	light	4	7	46	44	73	24.8
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2008	4dr SUV turbocharged 221hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	flat	med	none	25	30	30	15	100	21.2
2008	4dr SUV turbocharged 215hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	flat	light	light	2	18	17	63	70	25.3
2007	4dr SUV turbocharged 215hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	flat	v.lt	none	10	25	20	45	100	21.6
2007	4dr SUV 268-horsepower 3.5L V6 7-speed shiftable automatic AWD	flat	light	light	6	9	18	67	69	20.8
2006	4dr SUV 302-horsepower 5.0L V8 7-speed shiftable automatic AWD	flat	lead	hvy	25	25	25	25	75	17.5
2006	4dr SUV 268-horsepower 3.5L V6 7-speed shiftable automatic AWD	hills	light	light	0	0	46	54	65	19.6
2005	4dr SUV 288-horsepower 5.0L V8 5-speed shiftable automatic AWD w/low range	flat	med	hvy	0	47	47	5	80	18.5
2005	4dr SUV 232-horsepower 3.7L V6 5-speed shiftable automatic AWD w/low range	flat	light	none	5	20	25	50	70	15.2
2004	4dr SUV 232-horsepower 3.7L V6 5-speed shiftable automatic AWD w/low range	flat	light	none	0	0	60	40	67	18.4
2003	4dr SUV 288-horsepower 5.0L V8 5-speed shiftable automatic AWD w/low range	flat	med	hvy	5	5	25	65	80	17.5
2003	4dr SUV 215-horsepower 3.2L V6 5-speed shiftable automatic AWD w/low range	mtns	light	light	0	0	20	80	65	16.0
2002	4dr SUV 342-horsepower 5.4L V8 5-speed shiftable automatic AWD w/low range	flat	med	none	1	48	8	44	90	15.6
2002	4dr SUV 288-horsepower 5.0L V8 5-speed shiftable automatic AWD w/low range	flat	med	light	8	50	20	23	88	16.1
2002	4dr SUV 215-horsepower 3.2L V6 5-speed shiftable automatic AWD w/low range	flat	med	hvy	15	25	35	25	70	16.0
2000	4dr SUV 268-horsepower 4.3L V8 5-speed shiftable automatic AWD w/low range	flat	light	none	0	0	20	80	100	27.6
2000	4dr SUV 215-horsepower 3.2L V6 5-speed shiftable automatic AWD w/low range	flat	med	none	0	0	10	90	65	21.5

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This page shows only averages. See all the Mercedes-Benz M-Class 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 Mercedes-Benz M-Class

Mercedes-Benz M-Class Real Gas Mileage: Pros
Year	Body/Powertrain	Comment
2013	4dr SUV turbocharged 240hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	Upper 20's on highway and mid-20's in suburbia from a vehicle that weighs 5K lbs. see full Mercedes-Benz M-Class review
2009	4dr SUV turbocharged 210hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	Other luxury cars/SUVs require premium gas. Diesel could be same or even cheaper than regular gas and with immense torque and a somewhat light foot I get almost 25Mpg see full Mercedes-Benz M-Class review
2007	4dr SUV turbocharged 215hp 3.0L V6 Diesel 7-speed shiftable automatic AWD	5000 lbs vehicle. Gets 32 mpg on highway up to 75 mph, faster than that mpg drops. 23 to 24 mpg around town see full Mercedes-Benz M-Class review

Mercedes-Benz M-Class Real Gas Mileage: Cons
Year	Body/Powertrain	Comment
2007	4dr SUV 302-horsepower 5.0L V8 7-speed shiftable automatic AWD	Have a V8, so I should have expected, but mpg is averaging about 16 around town. With the current gas prices, I dread going to the pump. $90 to fill up the huge tank. see full Mercedes-Benz M-Class 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