Does the 2025 Kia K5 need premium gas?
Every trim takes regular — no premium needed.
| Trim (engine / transmission) | Fuel | MPG | Fuel/yr |
|---|---|---|---|
| 2.5L 4-cyl, S8 automatic, FWD | REGULAR | 30 | $2,100 |
| 2.5L 4-cyl, S8 automatic, FWD | REGULAR | 29 | $2,150 |
| 2.5L 4-cyl, AM-S8 automatic, FWD | REGULAR | 27 | $2,300 |
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.
3 trim(s) · EPA FuelEconomy.gov · retrieved 2026-06-14.