Chevrolet Cobalt vs. Mazda RX-8 MPG

Chart is based on 139 fuel economy reports for the Chevrolet Cobalt and 202 fuel economy reports for the Mazda RX-8.

Chevrolet Cobalt 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 Sedan 155-horsepower 2.2L I4 4-speed automatic FWD	flat	light	light	0	1	9	90	70	31.0
2010	2dr Coupe 155-horsepower 2.2L I4 5-speed manual FWD	hills	light	light	57	22	10	12	100	21.6
2010	2dr Coupe 155-horsepower 2.2L I4 4-speed automatic FWD	hills	med	none	5	30	25	40	100	28.1
2009	4dr Sedan turbocharged 260hp 2.0L I4 5-speed manual FWD	hills	med	none	6	34	12	48	80	25.9
2009	4dr Sedan 155-horsepower 2.2L I4 4-speed automatic FWD	flat	light	light	3	25	33	38	60	32.9
2009	2dr Coupe turbocharged 260hp 2.0L I4 5-speed manual FWD	flat	med	none	10	15	2	73	100	30.2
2008.5	2dr Coupe turbocharged 260hp 2.0L I4 5-speed manual FWD	flat	lead	hvy	10	40	40	10	65	25.7
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2008	4dr Sedan 148-horsepower 2.2L I4 5-speed manual FWD	flat	med	none	6	10	13	71	67	32.4
2008	4dr Sedan 148-horsepower 2.2L I4 4-speed automatic FWD	flat	med	light	8	14	27	51	71	32.7
2008	2dr Coupe turbocharged 260hp 2.0L I4 5-speed manual FWD	flat	med	light	0	1	0	99	60	28.7
2008	2dr Coupe 171-horsepower 2.4L I4 5-speed manual FWD	flat	med	none	9	8	29	54	73	25.7
2008	2dr Coupe 171-horsepower 2.4L I4 4-speed automatic FWD	flat	med	light	5	13	28	55	65	28.0
2008	2dr Coupe 148-horsepower 2.2L I4 5-speed manual FWD	hills	light	light	2	23	27	48	70	28.6
2008	2dr Coupe 148-horsepower 2.2L I4 4-speed automatic FWD	hills	light	hvy	0	25	35	40	60	29.7
2007	4dr Sedan 173-horsepower 2.4L I4 4-speed automatic FWD	flat	med	none	0	10	35	55	70	28.5
2007	4dr Sedan 148-horsepower 2.2L I4 4-speed automatic FWD	flat	med	none	13	33	15	40	96	26.3
2007	2dr Coupe supercharged 205hp 2.0L I4 5-speed manual FWD	flat	med	light	13	35	27	25	73	26.6
2007	2dr Coupe 173-horsepower 2.4L I4 5-speed manual FWD	flat	lead	none	0	77	13	11	95	24.5
2007	2dr Coupe 173-horsepower 2.4L I4 4-speed automatic FWD	hills	med	light	39	13	18	31	78	26.9
2007	2dr Coupe 148-horsepower 2.2L I4 5-speed manual FWD	flat	light	none	8	22	10	60	72	35.0
2007	2dr Coupe 148-horsepower 2.2L I4 4-speed automatic FWD	flat	light	none	3	12	30	54	63	29.5
2006	4dr Sedan 171-horsepower 2.4L I4 5-speed manual FWD	mtns	light	none	1	34	0	65	61	35.6
2006	4dr Sedan 171-horsepower 2.4L I4 4-speed automatic FWD	flat	lead	light	18	23	30	30	70	26.3
2006	4dr Sedan 145-horsepower 2.2L I4 5-speed manual FWD	flat	v.lt	none	0	10	85	5	60	35.4
2006	4dr Sedan 145-horsepower 2.2L I4 4-speed automatic FWD	flat	light	none	4	54	14	28	74	28.4
2006	2dr Coupe supercharged 205hp 2.0L I4 5-speed manual FWD	flat	med	none	10	5	10	75	110	25.3
2006	2dr Coupe 171-horsepower 2.4L I4 5-speed manual FWD	flat	med	light	16	13	8	64	90	28.2
2006	2dr Coupe 171-horsepower 2.4L I4 4-speed automatic FWD	flat	med	hvy	7	22	40	31	93	24.3
2006	2dr Coupe 145-horsepower 2.2L I4 5-speed manual FWD	hills	light	light	11	26	10	55	60	36.6
2006	2dr Coupe 145-horsepower 2.2L I4 4-speed automatic FWD	flat	med	light	9	35	8	48	77	30.2
2005	4dr Sedan 145-horsepower 2.2L I4 5-speed manual FWD	flat	lead	hvy	15	0	50	35	75	28.0
2005	4dr Sedan 145-horsepower 2.2L I4 4-speed automatic FWD	flat	med	none	12	17	20	52	65	29.9
2005	2dr Coupe supercharged 205hp 2.0L I4 5-speed manual FWD	flat	med	none	5	13	58	23	70	27.9
2005	2dr Coupe 145-horsepower 2.2L I4 5-speed manual FWD	flat	med	light	0	6	15	79	75	37.6

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This page shows only averages. See all the Chevrolet Cobalt 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 Chevrolet Cobalt

Chevrolet Cobalt Real Gas Mileage: Pros
Year	Body/Powertrain	Comment
2010	2dr Coupe 155-horsepower 2.2L I4 4-speed automatic FWD	Around town it's not great, but out on the open road mileage almost doubles. see full Chevrolet Cobalt review
2009	2dr Coupe turbocharged 260hp 2.0L I4 5-speed manual FWD	The fuel economy is very good considering the performance available. I typically get better than 25MPG with a fair bit of city driving and fairly heavy throttle. see full Chevrolet Cobalt review
2009	4dr Sedan turbocharged 260hp 2.0L I4 5-speed manual FWD	In mixed driving I get 25 - 26 MPG, even with 75 mph stints and popping in and out of traffic. In pure highway, gets 28+ at 70+ see full Chevrolet Cobalt review
2008	4dr Sedan 148-horsepower 2.2L I4 4-speed automatic FWD	Better than most North American cars. Lower carbon footprint. Cheaper to run. see full Chevrolet Cobalt review
2007	2dr Coupe 173-horsepower 2.4L I4 5-speed manual FWD	Under good highway driving conditions the Cobalt can go 700km on a single tank, but even in harsh conditions fuel economy is reasonable. see full Chevrolet Cobalt review
2007	2dr Coupe 148-horsepower 2.2L I4 4-speed automatic FWD	Most neighbors report 35 mpg on hyway. here we do mostly high spped highway. see full Chevrolet Cobalt review
2007	2dr Coupe 173-horsepower 2.4L I4 4-speed automatic FWD	I like that the 2.4L engine is able to put out significantly more power than the 2.2L and keep the same economy. The SS 2.4L is pretty quick and fun to drive and I still get 28 mpg on average just gunning around town with a lead foot and about 20% high see full Chevrolet Cobalt review
2007	2dr Coupe 148-horsepower 2.2L I4 5-speed manual FWD	While not as impressive as some of its competitors, the Cobalt is still good for low to mid 30s if driven properly. see full Chevrolet Cobalt review
2007	2dr Coupe 148-horsepower 2.2L I4 4-speed automatic FWD	34 MPG observed - and this from a roomy stylish car that cost me less that 15,000 see full Chevrolet Cobalt review
2007	2dr Coupe 148-horsepower 2.2L I4 4-speed automatic FWD	While the Cobalt may only get 23mpg in real city driving with a heavy foot, it is still relatively easy to achieve 28mpg in the city and 35+mpg on freeway. see full Chevrolet Cobalt review

Chevrolet Cobalt Real Gas Mileage: Cons
Year	Body/Powertrain	Comment
2010	4dr Sedan 155-horsepower 2.2L I4 4-speed automatic FWD	The best documented rating I could find when looking indicated it still did not rival Fiesta. see full Chevrolet Cobalt 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