2020 Cadillac CT6 Specs: MPG, Gas Mileage, Engine Size & Dimensions
Cadillac CT6 maintenance schedule by model year
Verified year-by-year intervals for 2017–2019 are listed on the Cadillac CT6 maintenance schedule, where you can switch model year in the table.
2020 Cadillac CT6 Specs at a Glance
The 2020 Cadillac CT6 gets 21 mpg combined on the 3.6L All-Wheel Drive configuration, weighs 4,489 lbs, measures 205.9 in long. Figures are per configuration, not a single official number — other trims rate as low as 17 mpg combined. Every figure below comes from EPA, NHTSA, or manufacturer published data — no estimates.
- Combined MPG
- 21 mpg (18 city / 27 hwy)
- Best configuration: 3.6L · All-Wheel Drive · Automatic (S10) · other 2020 trims rate 17–21 mpg combined
- Engine
- 3.6L 6-cyl
- 3.6L · All-Wheel Drive · Automatic (S10) · 2 powertrains offered
- Curb weight
- 4,489 lbs
- Heaviest recorded configuration: CT6 V-SERIES AWD 4DR SEDAN
- Length
- 205.9 in · 74 in wide · 57.9 in tall
- Wheelbase
- 122.4 in
2020 Cadillac CT6 trims and MPG
| Trim | Engine | Trans | Drive | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| Auto (S10), 6 cyl, 3.6 L | 6 · 3.6L | Automatic (S10) | All-Wheel Drive | 18 | 27 | 21 |
| Auto (S10), 8 cyl, 4.2 L | 8 · 4.2L | Automatic (S10) | All-Wheel Drive | 14 | 25 | 17 |
Detailed Specifications
MPG & Fuel Economy
MPG for every year and trim
View details →Engine Specifications
Engine Specs for every year and trim
View details →Annual Fuel Cost
Fuel Cost for every year and trim
View details →Transmission Specifications
Transmission for every year and trim
View details →Drivetrain & Drive Type
Drivetrain for every year and trim
View details →Vehicle Class & EPA Size Category
Vehicle Class for every year and trim
View details →Maintenance Schedule & Service Intervals
Maintenance for every year and trim
View details →Dimensions & Size
Dimensions for every year and trim
View details →Curb Weight
Curb Weight for every year and trim
View details →Electric Range & Charging Time
EV Range for every year and trim
View details →Cadillac CT6 — All Years Overview
| Year | Trim | Engine | Trans | Drive | City | Hwy | Combined | Fuel |
|---|---|---|---|---|---|---|---|---|
| 2020 | Auto (S10), 6 cyl, 3.6 L | 6 · 3.6L | Automatic (S10) | All-Wheel Drive | 18 | 27 | 21 | Regular Gasoline |
| 2020 | Auto (S10), 8 cyl, 4.2 L | 8 · 4.2L | Automatic (S10) | All-Wheel Drive | 14 | 25 | 17 | Premium Gasoline |
| 2019 | Auto (S10), 4 cyl, 2.0 L | 4 · 2.0L | Automatic (S10) | Rear-Wheel Drive | 24 | 34 | 28 | Premium Gasoline |
| 2019 | Auto (S10), 6 cyl, 3.0 L | 6 · 3.0L | Automatic (S10) | All-Wheel Drive | 18 | 26 | 21 | Premium Gasoline |
| 2019 | Auto (S10), 6 cyl, 3.6 L | 6 · 3.6L | Automatic (S10) | All-Wheel Drive | 18 | 27 | 21 | Regular Gasoline |
| 2019 | Auto (S10), 8 cyl, 4.2 L | 8 · 4.2L | Automatic (S10) | All-Wheel Drive | 14 | 25 | 17 | Premium Gasoline |
| 2018 | Auto (S8), 4 cyl, 2.0 L | 4 · 2.0L | Automatic (S8) | Rear-Wheel Drive | 22 | 30 | 25 | Premium Gasoline |
| 2018 | Auto (S8), 6 cyl, 3.0 L | 6 · 3.0L | Automatic (S8) | All-Wheel Drive | 18 | 26 | 21 | Premium Gasoline |
| 2018 | Auto (S8), 6 cyl, 3.6 L | 6 · 3.6L | Automatic (S8) | All-Wheel Drive | 18 | 27 | 21 | Regular Gasoline |
| 2018 | Auto (variable gear ratios), 4 cyl, 2.0 L | 4 · 2.0L | Automatic (variable gear ratios) | Rear-Wheel Drive | 23 | 29 | 25 | Premium Gasoline |
| 2017 | Auto (S8), 4 cyl, 2.0 L | 4 · 2.0L | Automatic (S8) | Rear-Wheel Drive | 22 | 30 | 25 | Premium Gasoline |
| 2017 | Auto (S8), 6 cyl, 3.0 L | 6 · 3.0L | Automatic (S8) | All-Wheel Drive | 18 | 26 | 21 | Premium Gasoline |
| 2017 | Auto (S8), 6 cyl, 3.6 L | 6 · 3.6L | Automatic (S8) | All-Wheel Drive | 18 | 27 | 21 | Regular Gasoline |
| 2017 | Auto (variable gear ratios), 4 cyl, 2.0 L | 4 · 2.0L | Automatic (variable gear ratios) | Rear-Wheel Drive | 23 | 29 | 26 | Premium Gasoline |
| 2016 | Auto (S8), 4 cyl, 2.0 L | 4 · 2.0L | Automatic (S8) | Rear-Wheel Drive | 22 | 30 | 25 | Regular Gasoline |
| 2016 | Auto (S8), 6 cyl, 3.0 L | 6 · 3.0L | Automatic (S8) | All-Wheel Drive | 18 | 26 | 21 | Premium Gasoline |
| 2016 | Auto (S8), 6 cyl, 3.6 L | 6 · 3.6L | Automatic (S8) | All-Wheel Drive | 18 | 27 | 21 | Regular Gasoline |
Compare across every brand
All Cadillac CT6 specifications
Cadillac CT6 — Frequently Asked Questions
What is the fuel economy of the 2020 Cadillac CT6?
The Cadillac CT6 is EPA-rated at up to 28 MPG combined (24 city / 34 highway), a historical peak recorded on the 2019 model year.
What engine does the 2020 Cadillac CT6 have?
The Cadillac CT6 uses a 3.6L 6-cylinder engine paired with an Automatic transmission.
What years of the Cadillac CT6 are covered here?
This page documents 17 verified Cadillac CT6 configurations across model years 2016–2020.
Which model year of the Cadillac CT6 is the most fuel efficient?
The 2019 Cadillac CT6 holds the highest combined rating at 28 MPG; the 2020 sits lowest at 21 MPG, a difference of 7 MPG (about 33%) across the 5 rated years on file.
How many engine options does the Cadillac CT6 have?
The records list 4 distinct displacements for the Cadillac CT6 — 2L, 3L, 3.6L, 4.2L — which is why combined MPG varies between trims of the same year.
Is the 2020 Cadillac CT6 front-wheel drive or all-wheel drive?
The Cadillac CT6 appears in 2 drivetrain layouts across the years documented here — All-Wheel Drive, Rear-Wheel Drive — with the latest 2020 record on All-Wheel Drive.