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www.fueleconomy.gov
Photograph of Cars
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 Why is Fuel
Economy
Important?
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2009 Vehicles by Cadillac
Model
MPG
(city)
MPG
(hwy)
Annual
Fuel
Cost*

Greenhouse Gas
Emissions
(tons/yr)*
 Greenhouse gas (GHG) emissions from your car may contribute to climate change. Cars with better gas mileage emit less greenhouse gases. Click for more info.
EPA
Air
Pollution
Score
From 0 to 10 (best)
 The EPA air pollution score rates cars and light trucks based on how much smog-forming air pollution they emit. Some vehicles are available in multiple emission versions. Click for more info.
Cadillac STS
8 cyl, 4.6 L, Automatic (S6), Premium 		15 24
$2352
10.20 score: 06
Cadillac STS
6 cyl, 3.6 L, Automatic (S6), Regular 		17 26
$1935
9.20 score: 06
Cadillac STS-V
8 cyl, 4.4 L, Automatic (S6), Premium 		13 19
$2821
12.20 score: 06
Cadillac STS AWD
6 cyl, 3.6 L, Automatic (S6), Regular 		17 26
$1935
9.20 score: 06
Cadillac STS AWD
8 cyl, 4.6 L, Automatic (S6), Premium 		15 22
$2487
10.80 score: 06

Annual Fuel Costs and Greenhouse Gas Estimates are based on 45% highway driving, 55% city driving, and 15000 annual miles.

Assumed Fuel Prices:

  • Regular: 2.58
  • Premium: 2.82
  • Diesel: 2.63
  • CNG: 1.73
  • Electricity: 0.08 per kilowatt hour
  • E85: 2.13
  • LPG: 2.48