Which Car Has

Cadillac STS

Transmission, start-stop, premium fuel and flex-fuel by model year, 2010–2011

TransmissionThe 2011 Cadillac STS uses a 6-speed automatic in every configuration EPA tested.

Auto start-stopEPA did not report auto start-stop data for the 2011 Cadillac STS.

Premium fuelEPA tested the 2011 Cadillac STS on regular gasoline, not premium; your owner's manual or fuel-door label is the authority.

Flex-fuel (E85)No. EPA does not list any 2011 Cadillac STS configuration as a flex-fuel vehicle (FFV).

2011 at a glance

2 configurations tested by EPA

CVTNone
0 of 2
No CVT
ManualNone
0 of 2
Not offered
Auto start-stopNot reported
–
EPA reports from 2013
Premium fuelNone
0 of 2
EPA test fuel
Flex-fuel (E85)None
0 of 2
No FFV versions

EPA lists no manual transmission for any Cadillac STS from 2010–2011.

Cadillac STS features by model year

Which Cadillac STS model years have each feature. Each cell links to that year's configurations.
’10’11
CVT2010 CVT: None2011 CVT: None
Manual2010 Manual: None2011 Manual: None
Automated manual2010 Automated manual: None2011 Automated manual: None
Automatic2010 Automatic: All2011 Automatic: All
Start-stop2010 Start-stop: Not reported2011 Start-stop: Not reported
Premium fuel2010 Premium fuel: None2011 Premium fuel: None
Flex-fuel2010 Flex-fuel: None2011 Flex-fuel: None
All configurationsSome configurationsNoneNot reported by EPA

Configurations by year

2011 Cadillac STS

2 configurations
EPA model nameEngineTransmissionDriveStart-stopEPA test fuelFlex-fuel
STS3.6L 6-cyl6-speed automaticS6Rear-WheelNot reportedRegularNo
STS AWD3.6L 6-cyl6-speed automaticS6All-WheelNot reportedRegularNo

2010 Cadillac STS

4 configurations
EPA model nameEngineTransmissionDriveStart-stopEPA test fuelFlex-fuel
STS3.6L 6-cyl6-speed automaticS6Rear-WheelNot reportedRegularNo
STS4.6L 8-cyl6-speed automaticS6Rear-WheelNot reportedRegularNo
STS AWD3.6L 6-cyl6-speed automaticS6All-WheelNot reportedRegularNo
STS AWD4.6L 8-cyl6-speed automaticS6All-WheelNot reportedRegularNo

Check before you buy or refuel Confirm on the window sticker, owner's manual or with the dealer. Trims and options can differ from the configurations EPA tested.

About premium fuel EPA data shows the fuel a vehicle was tested on. It does not say whether premium is required or only recommended. Your owner's manual or fuel-door label is the authority.

Before using E85 Confirm the vehicle is a flex-fuel vehicle (FFV) in the owner's manual, or look for a yellow gas cap or an "FFV" badge. Not every version of a model is flex-fuel.

Source: U.S. EPA / Department of Energy vehicle data fromFuelEconomy.gov, data as of September 29, 2026.See how we classify vehicles.

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