1984 Cadillac Fleetwood/DeVille (FWD) MPG and Fuel Economy

On this page, you will find a complete guide to the miles per gallon and fuel efficiency data for the 1984 Cadillac Fleetwood/DeVille (FWD).

The 1984 Cadillac Fleetwood/DeVille (FWD) runs on diesel and is in the Large Cars car class.

Whether you are considering a purchase of the car, or just wanting to find out how economical and environmentally friendly (or un-friendly) your 1984 Cadillac Fleetwood/DeVille (FWD) is, we have the information you need.

🛣 How Many Miles per Gallon (MPG) Does a 1984 Cadillac Fleetwood/DeVille (FWD) Get?

First off, the most commonly asked question. A 1984 Cadillac Fleetwood/DeVille (FWD) gets up to 21 miles per gallon in the city, and 31 miles per gallon on the highway.

The combined average MPG for the 1984 Cadillac Fleetwood/DeVille (FWD) is 24 miles per gallon.

💵 What is the Average Yearly Fuel Cost for a 1984 Cadillac Fleetwood/DeVille (FWD)?

The estimated fuel costs for the 1984 Cadillac Fleetwood/DeVille (FWD) is $3,200 per year.

That value has been estimated by government regulators based on 15,000 miles driven per year, using regular gasoline, and a split of 55% city driving and 45% highway driving.

If you were to compare a 1984 Cadillac Fleetwood/DeVille (FWD) to an average vehicle over 5 years, you will spend $4,500 more on fuel.

🛢 How Many Barrels of Petroleum Does a 1984 Cadillac Fleetwood/DeVille (FWD) Consume?

The 1984 Cadillac Fleetwood/DeVille (FWD) will consume roughly 15 barrels of petroleum per year, using the standard estimate of 15,000 miles per year.

The majority of the world's petroleum is sourced from countries like Saudi Arabia, Russia, Iraq, and the United States.

Overview

The table below covers all of the miles per gallon, engine specifications, and emission details we have for the 1984 Cadillac Fleetwood/DeVille (FWD).

City MPG21
Highway MPG31
Combined MPG24
Save/Spend vs Average CarSpend $4,500
Fuel Cost$3,200
Fuel Type 1Diesel
ATV TypeDiesel
Barrels of Petroleum15
DriveRear-Wheel Drive
Cylinders6
Displacement4.3
TransmissionAutomatic 4-spd
Vehicle ClassLarge Cars
Start/Stop?No
Supercharged?No
Turbocharged?No

Related Cadillac Models from 1984

If you're interested in other Cadillac models from 1984, you can find them in the table below. You can click the model link to find miles per gallon and emission information for that model.

Link To or Reference This Page

If you use this page in your research, please reference MPG Buddy as the source.

  • "1984 Cadillac Fleetwood/DeVille (FWD) MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/cadillac/fleetwood-deville-fwd/1984.

  • "1984 Cadillac Fleetwood/DeVille (FWD) MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/cadillac/fleetwood-deville-fwd/1984. Accessed January 3, 2026.

  • 1984 Cadillac Fleetwood/DeVille (FWD) MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/cadillac/fleetwood-deville-fwd/1984.