1985 Cadillac Seville (5.7L 8-cyl, Diesel) MPG & Specs
Quick answer
The 1985 Cadillac Seville gets an EPA-estimated 17/26 MPG (city/highway) and 20 MPG combined, with an estimated $4,000/year fuel cost and 509 g/mi CO₂. Engine: 5.7 L 8-cyl.
The 1985 Cadillac Seville with the 5.7-liter 8-cylinder diesel engine returns an EPA-estimated 17 MPG in the city and 26 MPG on the highway, for a combined 20 MPG. This page summarizes the official EPA fuel-economy and emissions data for this configuration.
| Engine | 5.7 L 8-cyl |
| Transmission | Automatic 4-spd |
| Drive | Front-Wheel Drive |
| Fuel type | Diesel |
| Vehicle class | Midsize Cars |
| MPG — city | 17 |
| MPG — highway | 26 |
| MPG — combined | 20 |
| Annual fuel cost* | $4,000 |
| CO₂ tailpipe | 509 g/mi |
| EPA GHG score | — |
How efficient is it?
With a combined 20 MPG, the 1985 Cadillac Seville sits in the moderate range for fuel economy. That is roughly 22% thirstier than the typical Midsize Cars of its era (26 MPG class average) — expect higher fuel bills than class-average alternatives.
Fuel economy and running costs
At about $4,000 per year in fuel (EPA estimate, 15,000 mi/yr), fuel is a major part of the cost of owning the 1985 Cadillac Seville. Over five years that is roughly $20,000 at today's prices — before insurance, maintenance, and depreciation.
Emissions
The 1985 Cadillac Seville emits approximately 509 grams of CO₂ per mile at the tailpipe. Lower emissions generally track higher fuel economy.
How to read these numbers
EPA figures come from standardized laboratory test cycles and are the same estimates shown on the vehicle's window sticker. Your real-world mileage depends on driving style, conditions, fuel grade, and maintenance. Use combined MPG and annual fuel cost to compare vehicles fairly.