Cadillac CTS vs. Mazda RX-8 MPG

Chart is based on 133 fuel economy reports for the Cadillac CTS and 202 fuel economy reports for the Mazda RX-8.

Cadillac CTS 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
2016	4dr Sedan turbocharged 268hp 2.0L I4 8-speed shiftable automatic AWD	flat	med	light	0	0	60	40	70	22.1
2011	4dr Sedan 304-horsepower 3.6L V6 6-speed shiftable automatic AWD	flat	med	hvy	23	40	13	23	83	18.0
2010	4dr Wagon 304-horsepower 3.6L V6 6-speed shiftable automatic AWD	hills	light	light	0	5	2	93	60	23.0
2010	4dr Wagon 270-horsepower 3.0L V6 6-speed shiftable automatic AWD	flat	v.lt	none	0	64	3	34	70	18.2
2010	4dr Sedan 304-horsepower 3.6L V6 6-speed shiftable automatic RWD	flat	light	none	0	0	0	100	70	25.5
2009	4dr Sedan supercharged 556hp 6.2L V8 6-speed shiftable automatic RWD	hills	lead	light	10	8	39	44	62	15.3
2009	4dr Sedan supercharged 556hp 6.2L V8 6-speed manual RWD	hills	lead	light	5	5	35	55	65	13.2
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2009	4dr Sedan 304-horsepower 3.6L V6 6-speed shiftable automatic RWD	hills	med	hvy	11	16	21	53	71	22.6
2009	4dr Sedan 304-horsepower 3.6L V6 6-speed shiftable automatic AWD	flat	med	light	3	18	42	37	57	19.8
2008	4dr Sedan 304-horsepower 3.6L V6 6-speed shiftable automatic RWD	flat	light	light	10	32	34	24	72	19.7
2008	4dr Sedan 304-horsepower 3.6L V6 6-speed shiftable automatic AWD	flat	med	none	4	23	42	31	70	19.7
2008	4dr Sedan 304-horsepower 3.6L V6 6-speed manual RWD	hills	med	light	8	25	15	53	75	22.5
2008	4dr Sedan 263-horsepower 3.6L V6 6-speed shiftable automatic RWD	flat	light	none	1	6	19	74	70	23.4
2008	4dr Sedan 263-horsepower 3.6L V6 6-speed shiftable automatic AWD	hills	med	light	0	0	83	17	70	19.3
2007	4dr Sedan 255-horsepower 3.6L V6 5-speed shiftable automatic RWD	flat	light	light	4	9	9	78	71	20.3
2007	4dr Sedan 210-horsepower 2.8L V6 5-speed shiftable automatic RWD	mtns	lead	light	0	0	70	30	60	19.5
2006	4dr Sedan 400-horsepower 6.0L V8 6-speed manual RWD	flat	med	hvy	15	50	0	35	70	18.4
2006	4dr Sedan 255-horsepower 3.6L V6 6-speed manual RWD	flat	lead	light	25	10	5	60	85	21.0
2006	4dr Sedan 255-horsepower 3.6L V6 5-speed shiftable automatic RWD	flat	med	light	7	11	11	72	80	21.3
2006	4dr Sedan 210-horsepower 2.8L V6 6-speed manual RWD	flat	light	none	5	20	50	25	100	16.8
2006	4dr Sedan 210-horsepower 2.8L V6 5-speed shiftable automatic RWD	flat	med	light	7	20	50	23	67	19.2
2005	4dr Sedan 400-horsepower 5.7L V8 6-speed manual RWD	flat	med	light	7	13	24	57	69	20.7
2005	4dr Sedan 255-horsepower 3.6L V6 6-speed manual RWD	flat	med	none	2	15	35	48	60	20.2
2005	4dr Sedan 255-horsepower 3.6L V6 5-speed automatic RWD	flat	med	light	8	12	33	47	69	23.9
2004	4dr Sedan 400-horsepower 5.7L V8 6-speed manual RWD	flat	med	light	0	0	30	70	67	21.2
2004	4dr Sedan 255-horsepower 3.6L V6 5-speed automatic RWD	flat	med	none	7	25	24	45	66	21.9
2004	4dr Sedan 220-horsepower 3.2L V6 5-speed manual RWD	flat	med	light	10	10	0	80	70	25.6
2003	4dr Sedan 220-horsepower 3.2L V6 5-speed automatic RWD	flat	med	light	10	17	33	40	91	22.9

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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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TrueDelta Reviews the Real Gas Mileage of the Cadillac CTS

Cadillac CTS Real Gas Mileage: Cons
Year	Comment
	With the 2011 528i, BMW pioneered the use of a turbocharged four-cylinder engine in a $60,000 midsize sedan on this side of the Atlantic. The point: fuel economy, specifically EPA ratings of 22 mpg city and 33 mpg highway even with all-wheel-drive (24/34 with RWD). Audi followed with an A6 2.0T good for 20/29 (25/33 with FWD) a year later. The new CTS takes the path blazed by the Germans, but much less effectively. Though the Cadillac weighs significantly less than the Audi or the BMW, its EPA ratings are lower, 19/28 (20/30 with RWD). The same is the case with the two 3.6-liter V6 engine options, even though unlike the turbo four they can be paired with an eight-speed (instead of a six-speed) automatic. The rear-drive-only Vsport barely evades the gas guzzler tax with ratings of 16/24. Even the 445-horsepower turbocharged 4.4-liter V8 in the BMW 550i does a bit better. In my real-world driving, the CTS's trip computer confirmed this shortcoming. Even considering that the outside temperature was near zero, post-warm-up averages that clustered around 18 were disappointing. Only by driving the car with a light foot could I nudge the suburban average over 20, and even then not much over. A 320-horsepower 3.0-liter 640i Grand Coupe tested a week earlier in similar conditions did at least one mpg better than the 272-horsepower, 2.0-liter Cadillac. And when I tested a 528i xDrive in slightly warmer temps it often managed 25 mpg (in an EcoPro Mode the Cadillac lacks). In one trip this BMW even touched 30. see full Cadillac CTS review

What Our Members Are Saying about the Real Gas Mileage of the Cadillac CTS

Cadillac CTS Real Gas Mileage: Pros
Year	Body/Powertrain	Comment
2008	4dr Sedan 304-horsepower 3.6L V6 6-speed shiftable automatic RWD	fill for $50 on reg. today that is cheap see full Cadillac CTS review
2008	4dr Sedan 304-horsepower 3.6L V6 6-speed shiftable automatic AWD	23 cty & 26 hwy need i say more see full Cadillac CTS review
2008	4dr Sedan 304-horsepower 3.6L V6 6-speed shiftable automatic RWD	Averaging 25.5 on the highway. see full Cadillac CTS review
2003	4dr Sedan 220-horsepower 3.2L V6 5-speed automatic RWD	The fuel economy is better than expected, when driven in mixed city/highway driving. see full Cadillac CTS review
2003	4dr Sedan 220-horsepower 3.2L V6 5-speed automatic RWD	I get 25 miles per gallon - mostly highway driving - which is reasonable for a car of this size and performance. see full Cadillac CTS review
2003	4dr Sedan 220-horsepower 3.2L V6 5-speed automatic RWD	about 26 mpg is great....im use to driving a suv where im luckey to get 16mpg highway see full Cadillac CTS review

Cadillac CTS Real Gas Mileage: Cons
Year	Body/Powertrain	Comment
2009	4dr Sedan supercharged 556hp 6.2L V8 6-speed shiftable automatic RWD	14mpg is not great. However, the performance makes more than up for it. see full Cadillac CTS review
2008	4dr Sedan 304-horsepower 3.6L V6 6-speed shiftable automatic AWD	City mileage acceptable; Highway mileage could be better. see full Cadillac CTS review
2005	4dr Sedan 255-horsepower 3.6L V6 5-speed automatic RWD	I get 20-21mpg on my commute which is about 70%hwy, and normally 25-27 with pure freeway driving, it just seems with technology today they could kick that up to 23-24 and 28-30 respectively. see full Cadillac CTS review
2004	4dr Sedan 255-horsepower 3.6L V6 5-speed automatic RWD	Average at best. Yea it is a heavy car with all the safety eqipment. see full Cadillac CTS 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