First Kenworth Powered by ISX12 G Natural Gas Engine Delivered
Kenworth delivered its first full-production truck powered by the new 400-hp Cummins Westport ISX12 G natural gas engine during a special roll-out ceremony Tuesday before employees at the Kenworth assembly plant in Renton, Wash.


Kenworth delivered its first full-production truck powered by the new 400-hp Cummins Westport ISX12 G natural gas engine during a special roll-out ceremony Tuesday before employees at the Kenworth assembly plant in Renton, Wash.
Kenworth’s initial 400-hp ISX12 G engine went into a Kenworth T800 Extended Day Cab. The truck’s keys and a commemorative plaque were presented by Preston Feight, Kenworth assistant general manager for sales and marketing to Jerry Winchester, CEO of Chesapeake Oilfield Services and Chris Broussard, president of COS affiliate Oilfield Trucking Solutions.
OTS maintains its headquarters in Oklahoma City, Okla., and is part of Chesapeake Oilfield Services, which also includes Performance Technologies, Hodges Trucking Co., Great Plains Oilfield Rentals, Compass Manufacturing, and Nomac Drilling. The group’s trucking divisions have purchased more than 400 Kenworth T800 and C500 diesel trucks in the past three years.
The privilege of driving the T800 with the 400-hp ISX12 G off the assembly line went to Winchester with Broussard in the passenger seat.
Oilfield Trucking Solutions operates a 100% Kenworth fleet of 260 trucks in Texas, Oklahoma, Ohio, Pennsylvania, and West Virginia. The company’s trucks traveled several million miles last year, transporting thousands of barrels of water and crude daily to help producers meet drilling, completion and production needs. The T800 is powered by compressed natural gas (CNG) and will haul crude oil throughout various Oklahoma oil plays.
The Cummins Westport ISX12 G engine requires a single fuel source and can run on either CNG or LNG (liquefied natural gas), both of which are cost-effective, low-carbon and low-emissions fuels. Kenworth offers the ISX12 G for the T800 short hood with a 116.5-inch BBC and T660.
Oilfield Trucking Solutions’ natural gas-powered Kenworth T800 short hood is equipped with two side-mounted Type 4 CNG cylinder tanks for a range of 450 miles and the Kenworth Extended Day Cab for improved driver comfort.
More Fleet Management

How Telematics Improves Visibility, Control, and Performance in Refrigerated Fleets
Explore how telematics help refrigerated fleets improve visibility, uptime, efficiency, compliance, and cargo protection across connected cold chain operations.
Read More →
What the U.S.-Canada Trade War Means for Trucking
Escalating U.S.-Canada tariffs could disrupt cross-border freight, reduce truck volumes, raise costs, and create new uncertainty for carriers on both sides of the border.
Read More →
What Are Trucking’s Top Concerns for 2026?
The American Transportation Research Institute wants to know what's worrying trucking fleet managers, drivers, and other stakeholders in its annual Industry Issues survey.
Read More →
American Trucking Associations Looks for a New Leader
ATA President and CEO Chris Spear abruptly left his job at the association on August 21, at a pivotal time for the trucking industry.
Read More →
Public Wi-Fi Cybersecurity Risks: How Truck Drivers and Fleets Can Protect Their Data
Public Wi-Fi can expose truck drivers and fleets to credential theft, malware, and other cyber threats. Here’s how to reduce the risk on the road.
Read More →
For Nicky Cupp, Fleet Innovation Starts With Frustration
HDT Truck Fleet Innovator Nicky Cupp turns everyday pain points at Fraley & Schilling into opportunities for better technology and smarter processes.
Read More →
Adam Buttgenbach’s Approach to Electric Trucks: Start With Where They Fit
HDT Truck Fleet Innovator Adam Buttgenbach helped PepsiCo build one of North America’s largest EV fleets by focusing on where electric trucks make operational sense.
Read More →
Deen Albert: Let Automation Do the Math, People Make the Decisions
HDT Truck Fleet Innovator Deen Albert makes sure people are still at the heart of operations at Grand Island Express, even while adopting artificial intelligence tools. AI-assisted dispatch helped boost revenue 25% with the same number of trucks.
Read More →Trimble’s New AI Agent Takes Aim at Fleet Back-Office Busywork
Arc Agent works across Trimble TMS products to automate repetitive tasks such as freight orders, maintenance, invoices, fuel costs and more.
Read More →
How HDT’s 2026 Truck Fleet Innovators Are Rethinking Fleet Operations
Meet five trucking leaders who are challenging assumptions, solving operational problems, and putting innovative ideas to work.
Read More →

