35/100

1984Large CarsDiesel

1984 Buick LeSabre

EPA ID: 27056

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City MPG

Combined MPG

21MPG· Average

Highway MPG

Fuel Economy Overview

The 1984 Buick LeSabre achieves an EPA-estimated 21 MPG in combined city and highway driving, with 18 MPG in the city and 26 MPG on the highway. Powered by a 5.7L 8-cylinder engine paired with a automatic 4-spd, this large cars .

In terms of environmental impact, the 1984 LeSabre produces approximately 485 grams of CO2 per mile. This figure is measured under standardized EPA test conditions and represents tailpipe emissions only. For context, the average new vehicle sold in the United States produces approximately 400 grams of CO2 per mile, meaning this LeSabre has higher-than-average emissions in this regard.

The estimated annual fuel cost for this vehicle is $3,850, based on 15,000 miles of driving per year and current national average fuel prices. Compared to the average new vehicle, you would save $8,500 over a 5-year period. This calculation accounts for differences in fuel consumption efficiency and provides a practical measure of long-term ownership costs attributable to fuel economy.

Energy DNA

Vehicle ClassLarge Cars

Fuel TypeDiesel

Engine5.7L 8-cyl

AspirationNaturally Aspirated

TransmissionAutomatic 4-spd

Drive TypeN/A

Green Scorecard

CO2 Emissions485 g/mi

Start-Stop SystemNot Equipped

GHG Score-1/10

Smog RatingN/A

Est. Annual Cost$3,850

5-Year Cost DeltaSave $8,500

Personalized Commute CalculatorEPA defaults to 55% City / 45% Hwy

55% City45% Highway

Adjust the slider to match your daily driving habits. City driving involves stop-and-go traffic under 45mph, while highway driving represents sustained speeds over 55mph.

Your Real MPG

20.9

Impact vs EPA

+$13

/ year

💨

Aerodynamic Speed Penalty

EPA highway tests average roughly 48 mph. Driving at 75 mph increases aerodynamic drag exponentially. Expect your real-world highway fuel economy to drop by roughly 15-20% at interstate speeds.

5-Year Total Cost of Ownership

Estimated Monthly Cost

$715/mo

Includes estimated depreciation, fuel, insurance, and state fees over 5 years. Does not include loan interest.

Annual Mileage15,000 mi

Value Depreciation

Est. value lost over 60 months

$20,000

46.6%

Fuel & Electricity

Based on National Average rates ($3.50/gal)

$12,500

29.1%

Estimated Insurance

Based on vehicle class risk profile

$10,000

23.3%

State Registration Fees

Based on National Average DMV base rates

$400

0.9%

Total 5-Year Cost$42,900

Recall Intelligence

Campaign #89V102000·1989-07-20

critical

Component: VEHICLE SPEED CONTROL

A SMALL NYLON BUSHING IN THE CRUISE CONTROL SERVO BAIL MAY SLIP OUT OF PLACE, CAUSING INTERMITTENT AND UNEXPECTED INCREASES IN ENGINE SPEED OR DIESELING (ENGINE RUN ON WITH IGNITION OFF).

Consequence & Remedy

Consequence: SERVO ROD ASSEMBLY COULD CATCH ON ENGINE COMPONENTS ANDRESULT IN A STUCK THROTTLE WITH POTENTIAL FOR A VEHICLE CRASH.

Remedy: INSTALL A NEW BUSHING IN CRUISE CONTROL SERVO BAIL.

Campaign #84V103000·1984-09-17

moderate

Component: FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS

RUBBER FUEL HOSE COULD ALLOW A SLOW FUEL LEAK WHILE THE ENGINE IS RUNNING.

Consequence & Remedy

(Based on 200,000 miles driven)

97.0 metric tons CO₂

Equivalent To:

🌳 120 tree seedlings grown for 10 yrs

✈️ 8.1 cross-country flights/yr

Data Provenance

Data directly from the EPA National Vehicle and Fuel Emissions Laboratory. The combined rating is a weighted average (55% city, 45% highway). For official figures, visit fueleconomy.gov.