2021 BMW M340iFuel Economy & MPG Ratings

Hybrid Compact CarsRear-Wheel Drive

Photo: OWS Photography. CC BY 4.0. via Wikimedia Commons

City

MPG

Highway

MPG

Combined

MPG

Trim Comparison

Automatic (S8)

Premium Hybrid

City

Hwy

Comb

Fuel cost: $3,150/yr

Trim	Engine	City	Hwy	Combined	Fuel Cost/yr
Automatic (S8)	Premium Hybrid	23	32	26	$3,150

Annual Fuel Cost

$3,150

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

5-Year Fuel Savings

$-3,750

vs. average new vehicle

EPA Fuel Economy Score: 5/10

GHG Score: 5/10

Environment

CO₂ Tailpipe Emissions: 333 g/mile
Annual Petroleum Consumption: 11.4 barrels

Specifications

Engine: 3L 6-cyl
Transmission: 8-speed Automatic
Drivetrain: RWD
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: 3L, 6-cylinder
Induction Type: SIDI; Mild Hybrid
Efficiency Tech: Auto Start-Stop
Fuel Type: Premium Gasoline

Annual Fuel Cost by State

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

National AvgEPA default

$4.490/gal$2,590/yr

California

$5.957/gal$3,437/yr

Texas

$3.888/gal$2,243/yr

Florida

$4.136/gal$2,386/yr

New York

$4.522/gal$2,609/yr

Ohio

$4.510/gal$2,602/yr

Washington

$5.591/gal$3,226/yr

Colorado

$4.618/gal$2,664/yr

Minnesota

$4.344/gal$2,506/yr

Massachusetts

$4.448/gal$2,566/yr

State	Gas Price	Annual Cost	vs. National Avg
National AvgEPA default	$4.490/gal	$2,590/yr	—
California	$5.957/gal	$3,437/yrHIGHEST	+$847
Texas	$3.888/gal	$2,243/yrLOWEST	$-347
Florida	$4.136/gal	$2,386/yr	$-204
New York	$4.522/gal	$2,609/yr	+$19
Ohio	$4.510/gal	$2,602/yr	+$12
Washington	$5.591/gal	$3,226/yr	+$636
Colorado	$4.618/gal	$2,664/yr	+$74
Minnesota	$4.344/gal	$2,506/yr	$-84
Massachusetts	$4.448/gal	$2,566/yr	$-24