Cummins introduces its B6.7 Octane engine.
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Cummins introduces its B6.7 Octane engine. The B6.7 Octane is designed to give medium-duty fleets a gasoline alternative with familiar Cummins architecture. May 20, 2026 8:55 AM Cummins Inc. has expanded its medium-duty engine lineup with the introduction of the B6.7 Octane, a gasoline-fueled platform built for fleets that want the durability of a traditional work-truck engine without the complexity of diesel emissions systems. The company positions the engine as a practical option for vocational, municipal, and pickup-and-delivery operations that prioritize uptime, predictable maintenance, and lower acquisition costs. The B6.7 Octane is based on the long-running B-series architecture, a platform familiar to many technicians across North America. Cummins highlighted that the engine is engineered for medium-duty duty cycles where consistent starts, short-haul routing, and stop-and-go operation are common. For service truck operators, the gasoline configuration removes the need for diesel particulate filters, DEF systems, and regeneration cycles - an advantage for fleets that want to simplify maintenance routines. While Cummins has not positioned the B6.7 Octane as a replacement for diesel in heavy vocational work, the company noted that gasoline power can be a strong fit for applications where payload, route predictability, and operating hours align with medium-duty...
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