2020 Cadillac CT6

Fuel economy, running costs, emissions and safety · from U.S. EPA and NHTSA data

The 2020 Cadillac CT6 is sold in the U.S. with gasoline power. The EPA lists 2 configurations for this model year, with combined economy from 17 to 21 MPG and an estimated annual fuel cost of $3,100 to $4,700 at 15,000 miles.

Key numbers

Model year	2020
Vehicle class	Large Cars
Fuel type(s)	Gasoline
Combined economy	17-21 MPG
Best / worst combined	21 / 17 MPG
Annual fuel cost	$3,100-$4,700
Tailpipe CO₂	420-521 g/mi
EPA smog rating	3-5 / 10

What it costs to fuel

Across its configurations, the 2020 CT6 costs about $3,100 to $4,700 a year to fuel at the EPA's 15,000-mile basis, averaging roughly $3,900. Over five years that is about $19,500 in fuel alone before maintenance, insurance and depreciation — which is why the running cost, not just the price, decides what a car really costs.

Relative to an average new vehicle, this CT6 configuration spends about $4,000 more on fuel over five years.

For context, the average combined economy of large cars in this dataset is about 29 MPG. The CT6 sits roughly 10 MPG below that mark at its midpoint, making it thirstier than average for its EPA class.

Configurations and fuel economy

Version	Engine	Drive	Trans	Fuel	Combined	Annual fuel
CT6 AWD	3.6L 6-cyl	All-Wheel	Automatic	Gasoline	21 MPG	$3,100
CT6 AWD	4.2L 8-cyl turbo	All-Wheel	Automatic	Gasoline	17 MPG	$4,700

Emissions, safety and size

The 2020 CT6 records tailpipe CO₂ of 420-521 g/mi, an EPA smog rating of 3-5 out of 10. The EPA classifies it as large cars.

Compare this car

Open the comparison tool to line this 2020 CT6 up against any other vehicle in the database, or jump to other years and trims from the 2020 Cadillac CT6 overview.

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Data: U.S. EPA FuelEconomy.gov (public domain) and NHTSA SafetyRatings. Figures are EPA estimates; real-world results vary.