2018 Cadillac CT6
Fuel economy, running costs, emissions and safety · from U.S. EPA and NHTSA data
The 2018 Cadillac CT6 is sold in the U.S. with gasoline and plug-in hybrid power. The EPA lists 4 configurations for this model year, with combined economy from 21 to 25 MPG and an estimated annual fuel cost of $3,100 to $3,800 at 15,000 miles.
Key numbers
| Model year | 2018 |
|---|---|
| Vehicle class | Large Cars |
| Fuel type(s) | Gasoline, Plug-in Hybrid |
| Combined economy | 21-25 MPG |
| Best / worst combined | 25 / 21 MPG |
| Annual fuel cost | $3,100-$3,800 |
| Tailpipe CO₂ | 144-424 g/mi |
| EPA smog rating | 3-5 / 10 |
What it costs to fuel
Across its configurations, the 2018 CT6 costs about $3,100 to $3,800 a year to fuel at the EPA's 15,000-mile basis, averaging roughly $3,325. Over five years that is about $16,625 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 $4,500 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 6 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 | 2.0L 4-cyl turbo | Rear-Wheel | Automatic | Gasoline | 25 MPG | $3,200 |
| CT6 Plug-In | 2.0L 4-cyl turbo | Rear-Wheel | Automatic | Plug-in Hybrid | 25 MPG | $3,200 |
| CT6 AWD | 3.0L 6-cyl turbo | All-Wheel | Automatic | Gasoline | 21 MPG | $3,800 |
| CT6 AWD | 3.6L 6-cyl | All-Wheel | Automatic | Gasoline | 21 MPG | $3,100 |
Emissions, safety and size
The 2018 CT6 records tailpipe CO₂ of 144-424 g/mi, an EPA smog rating of 3-5 out of 10, and an EPA electric range of 430 to 430 miles when running on battery. The EPA classifies it as large cars.
Compare this car
Open the comparison tool to line this 2018 CT6 up against any other vehicle in the database, or jump to other years and trims from the 2018 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.