Heavy Duty Trucking Logo
MenuMENU
SearchSEARCH

Kenworth Adds Natural Gas Engine Option for T680, T880, and T880S

The Kenworth T680 on-highway flagship and Kenworth T880 and T880S vocational trucks are now available with the Cummins Westport L9N near zero NOx emissions natural gas engine.

August 10, 2018
Kenworth Adds Natural Gas Engine Option for T680, T880, and T880S

The Cummins Westport L9N Near Zero Natural Gas Engine is available as an option on the Kenworth T680, T880, and T880S trucks.

Photo courtesy Kenworth

1 min to read


The Kenworth T680 on-highway flagship and Kenworth T880 and T880S vocational trucks are now available with the Cummins Westport L9N near zero NOx emissions natural gas engine.

The L9N engine is certified to the California Air Resources Board’s optional low NOx standard for emissions, representing a 90% reduction from engines operating at the current Environmental Protection Agency NOx limit.

Ad Loading...

The L9N features on-board diagnostic capability, a three-way catalyst, closed crankcase ventilation system, and an engine control module designed for durability.

On the Kenworth Trucks, the 8.9-liter L9N is rated at 320 horsepower and 1,000 lbs.-ft. of torque. It can be powered by either compressed natural gas or liquefied natural gas and is also compatible with renewable natural gas, which offers a further reduction in greenhouse gas emissions.

“The Kenworth T680, T880, and T880S specified with the Cummins Westport L9N near zero emissions engine are ideal for pickup and delivery, vocational and refuse fleets focused on reducing their environmental impact and decreasing operating costs,” said Kurt Swihart, Kenworth marketing director.

More Fuel Smarts

NACFE Run on Less 2026 findings.
Fuel Smartsby Jack RobertsMay 1, 2026

NACFE: Fleets Need to Recalibrate TCO Strategies as Electric Trucks Gain a Long-Term Edge

NACFE’s Run on Less data has found that recent setbacks aside, electric truck powertrains are trending toward market leadership by 2025.

Read More →
Gray Volvo tractor pulling trailer on open highway
Fuel Smartsby Deborah LockridgeMay 1, 2026

New High-Horsepower Natural Gas Engine Could Expand Fleet Options

Westport and Volvo are demonstrating a 500-hp truck with diesel-like efficiency — one that also offers what Westport says is a better pathway to using hydrogen fuel in trucks.

Read More →
Illustration with oil wells silhouetted against red and gold sky
Fuel Smartsby Deborah LockridgeMay 1, 2026

Why Fuel Diversification Matters for Trucking Fleets

Relying on diesel alone exposes fleets to fuel price volatility. Here’s why diversification with electric, natural gas, and renewable fuels can reduce risk.

Read More →
Ad Loading...
Range Energy eTrailer.
Fuel Smartsby News/Media ReleaseApril 17, 2026

Range Energy Confirms eTrailer Performance in Winter Testing as Commercial Rollout Nears

Range Energy said its production-ready eTrailer system proved it can boost stability, safety, and efficiency in sub-zero winter conditions as the company moves toward scaled deployment.

Read More →
Circles with trucks demonstrating sustainable features and Top Green Fleets logo
Fuel Smartsby Deborah LockridgeApril 16, 2026

Top Green Fleets of 2026: Nomination Deadline Extended

Is your company a leader in sustainability efforts among trucking fleets? If so, Heavy Duty Trucking's editors want to hear from you.

Read More →
Youtube thumbnail featuring man in Big-Lebowski-inspired sweater
Fuel Smartsby Deborah LockridgeApril 13, 2026

New Lightweight Wheel Cover Targets Simpler Aero Gains [Watch]

Watch to learn how Deflecktor's new wheel cover design is taking a simpler approach to aerodynamics, with an eye toward making it more practical for both trucks and trailers.

Read More →
Ad Loading...
Dual truck tires with black aerodynamic wheel cover and a man bending down getting ready to take one off
Fuel Smartsby Deborah LockridgeApril 10, 2026

Deflecktor: Hubbub Aerodynamic Wheel Cover Cost-Effective Even for Trailers

Aerodynamic wheel covers can deliver small but meaningful fuel-economy gains for fleets, and Deflecktor says its latest design aims to make the technology easier and more affordable to deploy.

Read More →
Podcast thumbnail saying "How to Save on Fuel Costs" with diesel pump in the background and photo of the woman guest
Fuel SmartsApril 9, 2026

Cutting Fleet Fuel Costs in a Volatile Market [Listen]

When diesel prices are as volatile as they've been in 2026, it makes it tough for trucking fleets to plan and control costs. Breakthrough Fuel's Jenny Vander Zanden has insights on near-term savings strategies.

Read More →
YouTube thumbnail saying "How to Save on Fuel Costs" with woman's photo and a photo of a diesel price pump
Fuel Smartsby Deborah LockridgeApril 9, 2026

Diesel Price Swings Aren’t Over. What Can Your Fleet Do?

Practical steps fleets can take to manage fuel costs, from purchasing strategies to driver behavior.

Read More →
Ad Loading...
Illustration with oil wells, dollar bills, and a diesel fuel pump
Fuel Smartsby Deborah LockridgeApril 7, 2026

Diesel Prices Surge Toward Record Highs as Oil Price Volatility Intensifies

Prices jumped another 24 cents in a week, with California topping $7.50 and new data showing fleet fuel costs may already be at record levels.

Read More →