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Cadillac STS Fuel Economy (g/100m)

g/100m Number of Vehicles
4 gallons per 100 meters 7 vehicles
5 gallons per 100 meters 15 vehicles
6 gallons per 100 meters 3 vehicles
7 gallons per 100 meters 2 vehicles
8 gallons per 100 meters 0 vehicles
9 gallons per 100 meters 0 vehicles
10 gallons per 100 meters 0 vehicles
11 gallons per 100 meters 0 vehicles
12 gallons per 100 meters 0 vehicles
13 gallons per 100 meters 0 vehicles
14 gallons per 100 meters 0 vehicles
15 gallons per 100 meters 0 vehicles
16 gallons per 100 meters 0 vehicles
17 gallons per 100 meters 0 vehicles
18 gallons per 100 meters 0 vehicles
19 gallons per 100 meters 0 vehicles
20 gallons per 100 meters 0 vehicles
21 gallons per 100 meters 0 vehicles
22 gallons per 100 meters 0 vehicles
23 gallons per 100 meters 0 vehicles
24 gallons per 100 meters 0 vehicles
25 gallons per 100 meters 0 vehicles
26 gallons per 100 meters 0 vehicles
27 gallons per 100 meters 0 vehicles
28 gallons per 100 meters 0 vehicles
29 gallons per 100 meters 0 vehicles
30 gallons per 100 meters 0 vehicles
31 gallons per 100 meters 0 vehicles
32 gallons per 100 meters 0 vehicles
33 gallons per 100 meters 0 vehicles
34 gallons per 100 meters 0 vehicles
35 gallons per 100 meters 0 vehicles
36 gallons per 100 meters 0 vehicles
37 gallons per 100 meters 0 vehicles
38 gallons per 100 meters 0 vehicles
39 gallons per 100 meters 0 vehicles
40 gallons per 100 meters 0 vehicles
41 gallons per 100 meters 1 vehicles
Model Year Body/Powertrain g/100m  
2008 2008 4dr Sedan 320-hp 4.6L V8 6-sp shiftable automatic AWD 4.99
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With the engine, transmission, and rear-wheel drive, the 2008 Cadillac STS has been averaging 4.99 L/100km (liters per 100 kilometers).

The 2008 Cadillac STSs in this analysis were driven mostly on the highway at an average speed of 60 kilometers per hour (about 90 percent of the kilometers driven). The rest of the kilometers were in the city (10 percent), in the suburbs (0 percent), and in heavy traffic (0 percent).

In addition, the average 2008 Cadillac STS in this analysis was driven on flat terrain with an ultra-light foot and the AC on only some of the time.
2008 2008 4dr Sedan 302-hp 3.6L V6 6-sp shiftable automatic RWD 4.61
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2007 2007 4dr Sedan 320-hp 4.6L V8 6-sp shiftable automatic RWD 4.58
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2006 2006 4dr Sedan 254-hp 3.6L V6 5-sp shiftable automatic AWD 5.26
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2006 2006 4dr Sedan 320-hp 4.6L V8 6-sp shiftable automatic RWD 4.08
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2006 2006 4dr Sedan 302-hp 3.6L V6 6-sp shiftable automatic RWD 5.19
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2005 2005 4dr Sedan 320-hp 4.6L V8 6-sp shiftable automatic AWD 23.5
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2005 2005 4dr Sedan 320-hp 4.6L V8 6-sp shiftable automatic RWD 4.9
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2005 2005 4dr Sedan 302-hp 3.6L V6 6-sp shiftable automatic RWD 4.76
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What Our Members Are Saying about the Real Gas Mileage of the Cadillac STS

Cadillac STS Real Gas Mileage: Cons
YearBody/PowertrainComment
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
 

Cadillac STS Gas Mileage (g/100m)

Unlike other fuel economy surveys, TrueDelta's Real-World Gas Mileage Survey includes questions about how and where a car was driven. So you can get an idea of the Cadillac STS's real-world g/100m based on how and where you drive a car.