Does the 1987 Dodge Diplomat 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 |
|---|---|---|---|
| 5.2L 8-cyl, Automatic 3-spd, RWD | REGULAR | 14 | $4,450 |
| 5.2L 8-cyl, Automatic 3-spd, RWD | REGULAR | 12 | $5,200 |
| 5.2L 8-cyl, Automatic 3-spd, RWD | PREMIUM | 17 | $4,550 |
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.