1986 Oldsmobile Calais (2.5L 4-cyl, Manual 5-spd) MPG & Specs
Quick answer
The 1986 Oldsmobile Calais gets an EPA-estimated 21/31 MPG (city/highway) and 24 MPG combined, with an estimated $2,550/year fuel cost and 370.292 g/mi CO₂. Engine: 2.5 L 4-cyl.
The 1986 Oldsmobile Calais with the 2.5-liter 4-cylinder regular gasoline engine returns an EPA-estimated 21 MPG in the city and 31 MPG on the highway, for a combined 24 MPG. This page summarizes the official EPA fuel-economy and emissions data for this configuration.
| Engine | 2.5 L 4-cyl |
| Transmission | Manual 5-spd |
| Drive | Front-Wheel Drive |
| Fuel type | Regular Gasoline |
| Vehicle class | Compact Cars |
| MPG — city | 21 |
| MPG — highway | 31 |
| MPG — combined | 24 |
| Annual fuel cost* | $2,550 |
| CO₂ tailpipe | 370.292 g/mi |
| EPA GHG score | — |
How efficient is it?
With a combined 24 MPG, the 1986 Oldsmobile Calais sits in the moderate range for fuel economy. That is about average for its class (Compact Cars, 25 MPG average).
Fuel economy and running costs
At about $2,550 per year in fuel (EPA estimate, 15,000 mi/yr), fuel is a major part of the cost of owning the 1986 Oldsmobile Calais. Over five years that is roughly $12,750 at today's prices — before insurance, maintenance, and depreciation.
Emissions
The 1986 Oldsmobile Calais emits approximately 370.292 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.