Does the 2010 Cadillac CTS Wagon need premium gas?
Every trim takes regular — no premium needed.
| Trim (engine / transmission) | Fuel | MPG | Fuel/yr |
|---|---|---|---|
| 3.0L 6-cyl, S6 automatic, RWD | REGULAR | 22 | $2,850 |
| 3.6L 6-cyl, S6 automatic, RWD | REGULAR | 21 | $2,950 |
The EPA records the fuel each version was tested on. Whether premium is strictly required or just recommended is an owner's-manual detail the EPA dataset doesn't include — so we don't guess it.
2 trim(s) · EPA FuelEconomy.gov · retrieved 2026-06-14.