Buick Century — the model line, not this exact trim. Photo: Charles01 · CC BY-SA 3.0 · Wikimedia Commons

1984 Buick Century

Buick · 4.3 L 6-cyl

See it on fueleconomy.gov

Model year1984

Combined MPG24

City MPG21

Highway MPG31

Annual fuel cost$4,000

Against the 730 buick cars

Combined MPG 24 MPGbest 31 · avg 21

Annual fuel cost $4,000best $2,150 · avg $3,318

Bars are scaled to the best in the list; the mark shows the list average. Lower is better for fuel cost; higher is better for the rest. All figures are the EPA's.

Summary

1984 Buick Century by Buick. The figures below are from US EPA fueleconomy.gov, with the page each one came from.

Details

Model year: 1984fueleconomy.gov · 3 Oct 2026

Efficiency

Combined MPG: 24fueleconomy.gov · 3 Oct 2026
City MPG: 21fueleconomy.gov · 3 Oct 2026
Highway MPG: 31fueleconomy.gov · 3 Oct 2026

Running cost

Annual fuel cost: $4,000fueleconomy.gov · 3 Oct 2026
CO₂ (tailpipe): 424.2 g/mifueleconomy.gov · 3 Oct 2026

Car

Body: Carfueleconomy.gov · 3 Oct 2026
EPA class: Midsize Carsfueleconomy.gov · 3 Oct 2026

Powertrain

Engine: 4.3 L 6-cylfueleconomy.gov · 3 Oct 2026
Transmission: Automatic 4-spdfueleconomy.gov · 3 Oct 2026
Fuel: Dieselfueleconomy.gov · 3 Oct 2026

More buick cars

See the list

2027 Buick Enclave AWD 2027 · All-Wheel Drive · 2.5 L 4-cyl turbo Combined MPG21Annual fuel cost$3,200

2027 Buick Enclave FWD 2027 · Front-Wheel Drive · 2.5 L 4-cyl turbo Combined MPG22Annual fuel cost$3,050

2026 Buick Enclave AWD 2026 · All-Wheel Drive · 2.5 L 4-cyl turbo Combined MPG21Annual fuel cost$3,200

2026 Buick Enclave FWD 2026 · Front-Wheel Drive · 2.5 L 4-cyl turbo Combined MPG22Annual fuel cost$3,050

2026 Buick Encore GX AWD 2026 · All-Wheel Drive · 1.3 L 3-cyl turbo Combined MPG27Annual fuel cost$2,500

2026 Buick Encore GX FWD 2026 · Front-Wheel Drive · 1.3 L 3-cyl turbo Combined MPG30Annual fuel cost$2,250

Listed on CarCody

Buick Cars: Every Model and Year With MPG730 listed

Sources

fueleconomy.gov/feg/noframes/28007.shtml· checked 3 Oct 2026