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1989 Dodge Diplomat — 5.2L 8-cyl, Automatic 3-spd, RWD
This 1989 Dodge Diplomat (5.2L 8-cyl, Automatic 3-spd, RWD) takes premium gasoline. PREMIUM
12
MPG combined (11 city / 14 hwy)
$6,400
est. fuel cost / year (EPA, 15k mi)
—
tailpipe CO₂
The EPA lists this trim as premium because that's the fuel the manufacturer specified for its mileage test. Many such engines will run on regular with slightly lower power and MPG — but check your owner's manual to see whether premium is required or just recommended.
Other 1989 Dodge Diplomat trims
| Trim | Fuel | MPG | Fuel/yr |
|---|---|---|---|
| 5.2L 8-cyl, Automatic 3-spd, RWD | PREMIUM | 17 | $4,550 |
| 5.2L 8-cyl, Automatic 3-spd, RWD | PREMIUM | 14 | $5,500 |
EPA fuel type: Premium · class: Midsize Cars · retrieved 2026-06-14.