Cummins Westport 'Playbook' Offers Guidance on Natural Gas for Fleets
Cummins Westport's new Natural Gas Playbook is a website to give new and existing natural gas customers guidance on evaluating and operating CWI-powered natural gas vehicles.

Screenshot of Natural Gas Playbook website

Cummins Westport's new Natural Gas Playbook is a website to give new and existing natural gas customers guidance on evaluating and operating CWI-powered natural gas vehicles.
Located at www.cwiplaybook.com, the five-step Natural Gas Playbook features information and tips on how to assess, specify, prepare, implement, and operate/maintain a CWI-powered natural gas fleet. The website provides answers for fleets that have questions about operating natural gas vehicles.
The Natural Gas Playbook answers questions such as:
What is natural gas and how does it reduce fleet emissions?
Can I calculate the emission reductions with natural gas?
What are zero carbon renewable fuels?
How do natural gas engines operate, and what about my application and the operational costs and maintenance requirements?
In addition to tips and tools for CWI products, the playbook also offers the opportunity to connect with Cummins and CWI experts to answer questions and support the adoption of natural gas into truck, refuse, school bus and transit applications.
The site features two new calculators.
The Greenhouse Gas Emissions Calculator calculator is based on three published North American well-to-wheel GHG Models: GREET, GREET California, and GHGenius. It provides the carbon dioxide equivalent WTW emission reductions possible with the use of natural gas or renewable natural gas in a variety of applications.
The Payback Calculator is a tool to calculate fuel savings, average fleet speed, service intervals, and fuel system capacity requirements.
More Fuel Smarts

DTNA Software Update Gives Truckers More Time Before DEF Derates Take Effect
The changes reflect EPA guidance aimed at reducing downtime caused by emissions-system faults while maintaining compliance requirements.
Read More →
New Agentic Predictive Maintenance Report Demonstrates How Degraded Aftertreatment Systems Waste Fuel
Questar analyzed a large mixed-class fleet and discovered it was wasting as much as $30 in fuel per vehicle, per day, because of mechanically degraded aftertreatment systems.
Read More →
New York City's Microhub Project is Delivering Results
Trucking, last-mile delivery companies, and environmental advocates like what they are seeing so far with New York's microhub program.
Read More →
Lessons Learned About Alternative Fuels: Start Small, Stay Flexible
Practical advice on adopting alternative fuels and ZEVs from HDT's 2026 Top Green Fleets, from renewable diesel and natural gas to electric trucks.
Read More →
Kempower Adds Flex EV Charger to Help Support Transition to Megawatt Charging
The Kempower Mega Satellite Flex has both a CCS and MCS connector, allowing operators to serve both types of heavy-duty vehicles.
Read More →
Hino Adds Electric Class 6/7 Truck
Hino says the Le Series is an important step in the company's efforts to reduce environmental impact and support its customers’ sustainability goals.
Read More →
Can Multi-Speed EV Transmissions Solve Heavy Trucking’s Biggest Electric-Vehicle Problems?
A startup called Sigma Powertrain believes purpose-built multi-speed gearboxes can boost efficiency, reduce battery size and improve gradeability for heavy-duty battery-electric trucks.
Read More →
Hendrickson Debuts Electraax E-Axle for Medium-Duty Trucks
Developed with Driventic, Hendrickson's new integrated e-axle is designed to improve efficiency, reduce weight, and extend range in Class 6-7 EV applications.
Read More →
50 Ways Fleets Can Cut Fuel Costs Now — Without Buying New Trucks
Fuel savings don’t come from one big change. They come from dozens of small ones. Here’s how leading fleets are stacking gains across drivers, routing, maintenance, and more.
Read More →
Top Green Fleets 2026: How Fleets Are Reducing Emissions in the Real World
What works in sustainable trucking today? Heavy Duty Trucking's Top Green Fleets are finding practical ways to cut fuel use, reduce emissions, and keep freight moving.
Read More →
