Dodge Diplomat: MPG and fuel economy by year

The EPA has rated the Dodge Diplomat across 6 model years, from the 1984 Dodge Diplomat through the 1989 Dodge Diplomat. The most recent 1989 Dodge Diplomat returns 17 combined MPG. The most efficient model year was the 1988 Dodge Diplomat at 18 MPG.

Pick a year below to open the full Dodge Diplomat page for that model year. Each year page covers combined, city, and highway MPG, the trim variants the EPA rates separately, the annual fuel cost across three driving patterns, and a year-over-year comparison so you can see whether the car has improved.

Fuel economy by model year

Combined MPG, city MPG, highway MPG, and the EPA's estimated annual fuel cost for every model year of the Dodge Diplomat. Click any year to see the full breakdown for that model year, including trim variants, the drivetrain, and a comparison against other vehicles in its segment.

Year	Model	Combined MPG	City	Highway	Annual fuel cost
1989	1989 Dodge Diplomat	17 MPG	15 MPG	20 MPG	$4,050
1988	1988 Dodge Diplomat	18 MPG	16 MPG	21 MPG	$3,850
1987	1987 Dodge Diplomat	17 MPG	15 MPG	20 MPG	$4,050
1986	1986 Dodge Diplomat	16 MPG	15 MPG	20 MPG	$4,300
1985	1985 Dodge Diplomat	17 MPG	15 MPG	20 MPG	$4,050
1984	1984 Dodge Diplomat	15 MPG	14 MPG	18 MPG	$4,000

How the Dodge Diplomat compares against the Midsize Cars class

Buyers usually compare the Dodge Diplomat against other cars in the same EPA class. The list below shows the most efficient cars in the Midsize Cars class for the 1989 model year, the latest year on this page. Each link opens the full page for that car.

Source: U.S. EPA fuel economy dataset. Annual fuel cost assumes 15,000 miles of driving per year and a 55% city, 45% highway split.