2018 · Large Car · Gas
2018 Cadillac CT6 MPG & fuel economy
The 2018 Cadillac CT6 is a large car offered in 3 EPA-rated configurations. The most efficient version returns 21 MPG combined (18 city / 27 highway) on regular gasoline. Across the lineup, combined ratings range from 21 to 25 MPG. Efficiency is unchanged from the 2017 model. Among 31 large cars rated for 2018, it ranks 19th for lowest fuel cost. At 15,000 miles a year with $3.10/gal regular gas, it costs about $2,214 a year to fuel.
What will it cost you?
Your mileage and prices are saved and used across the site.
Fuel average
The 2018 Cadillac CT6's fuel average is 8.9 km/L (11.2 L/100 km), or 21 MPG combined: 7.7 km/L in the city and 11.5 km/L on the highway.
| MPG | km/L | L/100 km | |
|---|---|---|---|
| City | 18 | 7.7 | 13.1 |
| Highway | 27 | 11.5 | 8.7 |
| Combined | 21 | 8.9 | 11.2 |
How it ranks among 2018 Large Cars
Full class ranking →Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.
CT6 MPG across model years
Full history →3 EPA-rated configurations
| Configuration | Type | City | Hwy | Combined | Range | Your cost / yr |
|---|---|---|---|---|---|---|
| AWD · 3.6L 6-cyl · 8-speed automatic CT6 AWD |
Gas | 18 MPG | 27 MPG | 21 MPG | — | $2,214 |
| RWD · 2.0L 4-cyl turbo · 8-speed automatic CT6 |
Gas | 22 MPG | 30 MPG | 25 MPG | — | $2,370 |
| AWD · 3.0L 6-cyl turbo · 8-speed automatic CT6 AWD |
Gas | 18 MPG | 26 MPG | 21 MPG | — | $2,821 |
Specs (most efficient configuration)
- Fuel
- Regular gasoline
- Engine / motor
- 3.6L 6-cyl
- Transmission
- 8-speed automatic
- Drivetrain
- AWD
- Passenger volume
- 110 cu ft
- Cargo volume
- 15 cu ft
- Tailpipe CO₂
- 416 g/mi
- EPA fuel economy score
- 4/10
- EPA greenhouse gas score
- 4/10
2018 Cadillac CT6 vs. rivals
Compare the 2018 CT6
With any other car from any year, including other CT6 model years. Type a year to jump, e.g. "2015 Accord".
Same year, other powertrains: 2018 Cadillac CT6 Plug-in Hybrid (62 MPGe + 25 MPG)
Frequently asked questions
What is the gas mileage of the 2018 Cadillac CT6?
Up to 21 MPG combined (18 city / 27 highway); ratings range from 21 to 25 MPG depending on configuration.
What fuel does the 2018 Cadillac CT6 use?
Regular gasoline.
What is the fuel average in km/L for the 2018 Cadillac CT6?
The 2018 Cadillac CT6's fuel average is 8.9 km/L (11.2 L/100 km), or 21 MPG combined: 7.7 km/L in the city and 11.5 km/L on the highway.
How much does it cost to fuel the 2018 Cadillac CT6 per year?
About $2,214 at 15,000 miles a year with $3.10/gal regular gas, or $14.76 per 100 miles. Use the calculator on this page to plug in your own mileage and prices.