2018 Cadillac Ct6
25MPG
Combined
3
Trims
Updated February 27, 2026
The 2018 Cadillac Ct6 is a Full-Size Sedan that delivers 21–25 combined MPG depending on trim. Here’s everything you need to know about this vehicle, from fuel economy to safety ratings.
2018 Cadillac Ct6 Specifications
| Spec | Value |
|---|---|
| Combined MPG | 21–25 combined MPG depending on trim |
| City MPG | 22 |
| Highway MPG | 30 |
| Body Style | Full-Size Sedan |
| Fuel Type | Premium |
| Drive | AWD |
| Available Trims | 3 |
Available Trims
| Trim | MPG (City/Hwy/Combined) | Engine | Transmission |
|---|---|---|---|
| 6 cyl | 18/26/21 | 3.0L 6cyl | Automatic (S8) |
| 6 cyl | 18/27/21 | 3.6L 6cyl | Automatic (S8) |
| 4 cyl | 22/30/25 | 2.0L 4cyl | Automatic (S8) |
Annual Fuel Cost
Based on EPA estimates, the 2018 Cadillac Ct6 costs approximately $2,416 per year in fuel. This assumes 15,000 miles driven annually and current fuel prices.
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