1988 Buick RivieraFuel Economy & MPG Ratings

Gasoline Midsize CarsFront-Wheel Drive

Photo: Jukka Peura from Pori, Suomi,cropped and altered by uploader Mr.choppers. CC BY 2.0. via Wikimedia Commons

City

MPG

Highway

MPG

Combined

MPG

Trim Comparison

Automatic 4-spd

Regular

City

Hwy

Comb

Fuel cost: $3,400/yr

Trim	Engine	City	Hwy	Combined	Fuel Cost/yr
Automatic 4-spd	Regular	17	26	20	$3,400

Annual Fuel Cost

$3,400

Based on gasoline at $3.67/gal, 15,000 miles/year

5-Year Fuel Savings

$-5,000

vs. average new vehicle

EPA Fuel Economy Score: -1/10

GHG Score: -1/10

Environment

CO₂ Tailpipe Emissions: 444 g/mile
Annual Petroleum Consumption: 14.9 barrels

Specifications

Engine: 3.8L 6-cyl
Transmission: 4-speed Automatic
Drivetrain: FWD
Body Style: Sedan
GVWR: Class 1 (≤6,000 lbs)

Source: EPA fuel economy data & NHTSA vPIC. Specifications reflect the most common trim configuration.

Engine & Efficiency Details

Source: EPA fueleconomy.gov

Engine Size: 3.8L, 6-cylinder
Induction Type: Port Fuel Injection
Fuel Type: Regular Gasoline

Annual Fuel Cost by State

Prices as of week ending May 18, 2026 · Source: EIA

National AvgEPA default

$4.490/gal$3,368/yr

California

$5.957/gal$4,468/yr

Texas

$3.888/gal$2,916/yr

Florida

$4.136/gal$3,102/yr

New York

$4.522/gal$3,392/yr

Ohio

$4.510/gal$3,383/yr

Washington

$5.591/gal$4,193/yr

Colorado

$4.618/gal$3,464/yr

Minnesota

$4.344/gal$3,258/yr

Massachusetts

$4.448/gal$3,336/yr

State	Gas Price	Annual Cost	vs. National Avg
National AvgEPA default	$4.490/gal	$3,368/yr	—
California	$5.957/gal	$4,468/yrHIGHEST	+$1,100
Texas	$3.888/gal	$2,916/yrLOWEST	$-452
Florida	$4.136/gal	$3,102/yr	$-266
New York	$4.522/gal	$3,392/yr	+$24
Ohio	$4.510/gal	$3,383/yr	+$15
Washington	$5.591/gal	$4,193/yr	+$825
Colorado	$4.618/gal	$3,464/yr	+$96
Minnesota	$4.344/gal	$3,258/yr	$-110
Massachusetts	$4.448/gal	$3,336/yr	$-32