1988 GMC S15 Cab Chassis 2WDFuel Economy & MPG Ratings

Gasoline Special Purpose Vehicle 2WDRear-Wheel Drive

City

MPG

Highway

MPG

Combined

MPG

Trim Comparison

Automatic 4-spd

Regular

City

Hwy

Comb

Fuel cost: $4,800/yr

Manual 4-spd

Regular

City

Hwy

Comb

Fuel cost: $4,800/yr

Trim	Engine	City	Hwy	Combined	Fuel Cost/yr
Automatic 4-spd	Regular	14	15	14	$4,800
Manual 4-spd	Regular	14	14	14	$4,800

Annual Fuel Cost

$4,800

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

5-Year Fuel Savings

$-12,000

vs. average new vehicle

EPA Fuel Economy Score: -1/10

GHG Score: -1/10

Environment

CO₂ Tailpipe Emissions: 635 g/mile
Annual Petroleum Consumption: 21.3 barrels

Specifications

Engine: 2.8L 6-cyl
Transmission: 4-speed Automatic
Drivetrain: RWD
Body Style: Special Purpose Vehicle 2WD

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

Engine & Efficiency Details

Source: EPA fueleconomy.gov

Engine Size: 2.8L, 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$4,811/yr

California

$5.957/gal$6,382/yr

Texas

$3.888/gal$4,166/yr

Florida

$4.136/gal$4,431/yr

New York

$4.522/gal$4,845/yr

Ohio

$4.510/gal$4,832/yr

Washington

$5.591/gal$5,990/yr

Colorado

$4.618/gal$4,948/yr

Minnesota

$4.344/gal$4,654/yr

Massachusetts

$4.448/gal$4,766/yr

State	Gas Price	Annual Cost	vs. National Avg
National AvgEPA default	$4.490/gal	$4,811/yr	—
California	$5.957/gal	$6,382/yrHIGHEST	+$1,571
Texas	$3.888/gal	$4,166/yrLOWEST	$-645
Florida	$4.136/gal	$4,431/yr	$-380
New York	$4.522/gal	$4,845/yr	+$34
Ohio	$4.510/gal	$4,832/yr	+$21
Washington	$5.591/gal	$5,990/yr	+$1,179
Colorado	$4.618/gal	$4,948/yr	+$137
Minnesota	$4.344/gal	$4,654/yr	$-157
Massachusetts	$4.448/gal	$4,766/yr	$-45