Does the 2018 Toyota Tundra 4WD FFV need premium gas?
Fuel grade varies by trim — see the breakdown below.
| Trim (engine / transmission) | Fuel | MPG | Fuel/yr |
|---|---|---|---|
| 5.7L 8-cyl, S6 automatic, 4WD | FLEX-FUEL | 15 | $4,150 |
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.
1 trim(s) · EPA FuelEconomy.gov · retrieved 2026-06-14.