Chevrolet SS vs. Cadillac STS Fuel Economy (L/100km)

Chart is based on 11 fuel economy reports for the Chevrolet SS and 28 fuel economy reports for the Cadillac STS.

Chevrolet SS L/100km

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
2017	4dr Sedan 415-horsepower 6.2L V8 6-speed shiftable automatic RWD	flat	med	light	0	0	50	50	70	14.2

This page shows only averages. See all the Chevrolet SS fuel economy data.

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
2008	4dr Sedan 320-horsepower 4.6L V8 6-speed shiftable automatic AWD	flat	v.lt	light	0	10	0	90	60	11.8
2008	4dr Sedan 302-horsepower 3.6L V6 6-speed shiftable automatic RWD	flat	med	light	9	11	30	50	73	10.9
2007	4dr Sedan 320-horsepower 4.6L V8 6-speed shiftable automatic RWD	flat	med	light	3	50	20	28	70	10.8
2006	4dr Sedan 320-horsepower 4.6L V8 5-speed shiftable automatic RWD	mtns	light	none	0	0	0	100	65	9.6
2006	4dr Sedan 254-horsepower 3.6L V6 5-speed shiftable automatic RWD	flat	med	light	20	9	10	60	67	12.2
2006	4dr Sedan 254-horsepower 3.6L V6 5-speed shiftable automatic AWD	flat	light	none	0	45	35	20	60	12.4
2005	4dr Sedan 320-horsepower 4.6L V8 5-speed shiftable automatic RWD	flat	med	light	0	3	43	53	67	11.5
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2005	4dr Sedan 320-horsepower 4.6L V8 5-speed shiftable automatic AWD	flat	med	light	10	45	5	40	70	16.3
2005	4dr Sedan 255-horsepower 3.6L V6 5-speed shiftable automatic RWD	flat	light	light	5	20	30	45	60	11.2

This page shows only averages. See all the Cadillac STS fuel economy data.

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Chevrolet SS Real Gas Mileage: Cons
Year	Comment
	My mention of a $1,300 gas guzzler tax foreshadowed this "why not." If you want a fuel-efficient car, you probably don't want a big, V8-powered sedan. But even compared to the Dodge Charger R/T the SS is a guzzler. This is partly because the very small number sold doesn't justify an upgrade to GM's latest engine and transmission technology, which includes variable valve timing, cylinder deactivation, and eight-speed automatic transmissions. These technologies enable the Charger R/T to earn EPA ratings of 16 mpg city, 25 mpg highway, while the SS can only manage 14/21 with a six-speed automatic or 15/21 with a six-speed manual (which skips from first to fourth under light throttle). In my real-world driving, the trip computer usually reported an average around 16 or 17 in the suburbs (20 if I drove with a very light foot) and MAYBE 24 on the highway. The trip computer in the Dodge reported averages that were usually higher by a couple MPG, but keep its engine in V4 mode (i.e. no lights to stop for) and the average can reach 30. see full Chevrolet SS review

Chevrolet SS Real Gas Mileage: Cons
Year	Body/Powertrain	Comment
2017	4dr Sedan 415-horsepower 6.2L V8 6-speed manual RWD	Wow, really, really bad. All the reviews you may have read about the fuel economy are dead on. You can optimistically get 24 on the freeway and low teens city. Then again you are NOT buying this car for fuel economy. see full Chevrolet SS review

Cadillac STS Real Gas Mileage: Cons
Year	Body/Powertrain	Comment
2006	4dr Sedan 320-horsepower 4.6L V8 5-speed shiftable automatic RWD	16 city/21 highway. Buy it only if you can afford it with out complaining. see full Cadillac STS review
2005	4dr Sedan 320-horsepower 4.6L V8 5-speed shiftable automatic AWD	This car is thirsty. I live in flat country and I get 15 mpg with 80% highway traffic. I only get 19 mpg on trips. It probably needs a 6th speed overdive for the highway. see full Cadillac STS review