MENU
SEARCHBacked by data and support from the Propane Education & Research Council (PERC), the new engine offers fleets a path to decarbonization without compromising on performance or range.
The new engine will provide fleet owners with diesel-like performance and durability, uptime, and low total cost of ownership.
Photo: Cummins
Cummins unveiled its B6.7 Propane engine for medium-duty fleet owners, which will be built on Cummins recently announced fuel-agnostic B-series platform and powered with propane Autogas, according to the company's news release.
Backed by data and support from the Propane Education & Research Council (PERC), the new engine offers fleets a path to decarbonization without compromising on performance or range.
“There is no single path to zero emissions that will work for all application types across all markets and duty cycles. Propane autogas can do its part today in the collective effort toward decarbonization,” said Tucker Perkins, president/CEO of PERC. “Using propane autogas today is an immediate solution toward reducing harmful emissions.”
The new engine will provide fleet owners with diesel-like performance and durability, uptime, and low total cost of ownership, with power expected ratings between 280–360 hp and 600–860 lb-ft of torque.
“We’ve had a strong and collaborative relationship with PERC throughout the development, testing and evaluation phases of this engine. We’re thrilled to continue that partnership and formally announce plans to bring the B6.7 Propane to market,” said Sam Geckler, technical project leader, Cummins.
The B6.7 Propane is suited for medium-duty truck, vocational, school bus, and terminal tractor markets, making it a low-emissions solution designed to meet or exceed EPA and CARB regulations in 2024.
“We’re confident this engine will deliver the power, performance and efficiency that users expect from Cummins. We also expect it to deliver the lowest CO2 emissions of any propane Autogas-powered engine, making it an attractive and cost-effective way for fleets to lower total transportation emissions,” Geckler said.
In Part 2 of a two-part conversation, AC Transit’s director of maintenance joins co-hosts Alex Roman and Mark Hollenbeck to discuss his maintenance team’s work with various types of vehicle, training, augmented reality, and more.
Read More →
Coalition leaders outline priorities for preserving bus funding, maintaining competitive grants, and ensuring flexibility for transit agencies nationwide.
Read More →
Two battery-electric buses entered service on Earth Day, with four additional vehicles expected to join the fleet this summer. Seven more buses are planned for the end of 2027, bringing Metro’s total zero-emission fleet to 13.
Read More →
Agencies from California to New York offered fare-free rides, community cleanups, and new tools to showcase transit’s role in cutting emissions.
Read More →
A 5% rise in deliveries and a surge in zero-emission buses signaled progress in 2025, but high costs, long lead times, and shifting funding priorities continue to cloud the outlook.
Read More →
The Santa Monica agency’s new charging infrastructure and fleet expansion aim to improve air quality, equity, and long-term system resilience.
Read More →
In Part 1, Blandon shares his journey from the U.S. Marines to a leadership role in public transit, along with insights on mentorship and professional growth within the industry.
Read More →
Sustainability Partners’ Arnold Albiar discusses how a service-based approach is helping airports and public agencies deploy and manage electric fleets more efficiently.
Read More →
NYSERDA funding will support electric microtransit and secure bike storage to improve first- and last-mile connections across downstate New York.
Read More →
In this conversation, TBC’s Executive Director Ed Redfern, President Corey Aldridge, and Washington Representative Joel Rubin outline the coalition’s key policy priorities, the challenges facing transit agencies, and how industry stakeholders can work together to strengthen the voice of bus transit at the federal level.
Read More →