1985 · Midsize Car · Diesel

1985 Buick Century Diesel MPG & fuel economy

The 1985 Buick Century Diesel is a midsize car offered in 2 EPA-rated configurations. The most efficient version returns 27 MPG combined (23 city / 32 highway) on diesel. Across the lineup, combined ratings range from 26 to 27 MPG. That's up 2 MPG from the 1984 model. Among 46 midsize cars rated for 1985, it ranks 10th for lowest fuel cost. At 15,000 miles a year with $3.70/gal diesel fuel, it costs about $2,056 a year to fuel.

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Combined 27 MPG 23 MPG city · 32 MPG hwy

Driving range — not published for this model

Your fuel cost $2,056 15,000 mi/yr · $13.70 per 100 mi

Class rank, 1985 #10 of 46 Midsize Cars by fuel cost

What will it cost you?

Your mileage and prices are saved and used across the site.

Miles per year Diesel $/gal

Fuel average

The 1985 Buick Century Diesel's fuel average is 11.5 km/L (8.7 L/100 km), or 27 MPG combined: 9.8 km/L in the city and 13.6 km/L on the highway.

	MPG	km/L	L/100 km
City	23	9.8	10.2
Highway	32	13.6	7.4
Combined	27	11.5	8.7

How it ranks among 1985 Midsize Cars

Full class ranking →

1Chevrolet Citation II25 MPG $1,860
2Dodge Aries25 MPG $1,860
3Plymouth Reliant25 MPG $1,860
4Buick Century24 MPG $1,938
5Oldsmobile Cutlass Ciera24 MPG $1,938
···
10Buick Century Diesel27 MPG $2,056
···
46Maserati Quattroporte8 MPG $5,812

1985 Century DieselOther midsize carsClass median: $2,447/yr

Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.

Century Diesel MPG across model years

Full history →

2 EPA-rated configurations

Configuration	Type	City	Hwy	Combined	Range	Your cost / yr
FWD · 4.3L 6-cyl · 3-speed automatic Century	Diesel	23 MPG	32 MPG	27 MPG	—	$2,056
FWD · 4.3L 6-cyl · 3-speed automatic Century	Diesel	23 MPG	32 MPG	26 MPG	—	$2,135

Specs (most efficient configuration)

Fuel: Diesel
Engine / motor: 4.3L 6-cyl
Transmission: 3-speed automatic
Drivetrain: FWD
Passenger volume: 98 cu ft
Cargo volume: 16 cu ft
Tailpipe CO₂: 377 g/mi

1985 Buick Century Diesel vs. rivals

vs Oldsmobile Cutlass Ciera Diesel 26 MPG · $2,135/yr Century Diesel saves $79/yr vs Chevrolet Celebrity Diesel 26 MPG · $2,135/yr Century Diesel saves $79/yr vs Pontiac 6000 Diesel 26 MPG · $2,135/yr Century Diesel saves $79/yr vs Oldsmobile Cutlass Ciera 24 MPG · $1,938/yr Cutlass Ciera saves $118/yr vs Chrysler LeBaron 24 MPG · $1,938/yr LeBaron saves $118/yr vs Chevrolet Celebrity 24 MPG · $1,938/yr Celebrity saves $118/yr vs Dodge Lancer 24 MPG · $1,938/yr Lancer saves $118/yr vs Pontiac 6000 24 MPG · $1,938/yr 6000 saves $118/yr vs Plymouth Caravelle 21 MPG · $2,214/yr Century Diesel saves $159/yr vs Buick Century 24 MPG · $1,938/yr Century saves $118/yr

Compare the 1985 Century Diesel

With any other car from any year, including other Century Diesel model years. Type a year to jump, e.g. "2015 Accord".

Same year, other powertrains: 1985 Buick Century (24 MPG)

Frequently asked questions

What is the gas mileage of the 1985 Buick Century Diesel?

Up to 27 MPG combined (23 city / 32 highway); ratings range from 26 to 27 MPG depending on configuration.

What fuel does the 1985 Buick Century Diesel use?

Diesel.

What is the fuel average in km/L for the 1985 Buick Century Diesel?