Does the 1985 Buick Regal need premium gas?
It depends on the trim. Some versions take premium and some take regular — check your exact engine/transmission below.
| Trim (engine / transmission) | Fuel | MPG | Fuel/yr |
|---|---|---|---|
| 4.3L 6-cyl, Automatic 4-spd, RWD | REGULAR | 19 | $3,300 |
| 3.8L 6-cyl, Automatic 3-spd, RWD | REGULAR | 19 | $3,300 |
| 4.3L 6-cyl, Automatic 4-spd, RWD | REGULAR | 19 | $3,300 |
| 3.8L 6-cyl, Automatic 3-spd, RWD | REGULAR | 18 | $3,450 |
| 4.3L 6-cyl, Automatic 3-spd, RWD | REGULAR | 18 | $3,450 |
| 4.3L 6-cyl, Automatic 3-spd, RWD | DIESEL | 23 | $3,400 |
| 5.7L 8-cyl, Automatic 3-spd, RWD | DIESEL | 21 | $3,700 |
| 3.8L 6-cyl, Automatic 4-spd, RWD | PREMIUM | 18 | $4,300 |
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.
8 trim(s) · EPA FuelEconomy.gov · retrieved 2026-06-14.