The 5.9 Cummins is said to be one of the most reliable diesel engines, but that doesn't mean it can't benefit from upgrades. Here's what owners recommend.

Cummins has decades of experience and market leadership providing diesel engines, specifically to the medium- and heavy-duty truck markets. Over time, the company has acquired more capabilities in ...

Going gas means you can ditch diesel exhaust fluid (DEF) tanks and emissions equipment while enjoying diesel-like maintenance intervals—Cummins figures 15,000 miles between oil changes.

For 1978 Dodge introduced the Mitsubishi 6DR5 diesel engine to its truck and van lineups as an optional economic engine. The 4-liter inline six-cylinder naturally aspirated diesel was serving ...

Ram unveiled the new 2025 Ram Chassis Cab trucks, featuring a new 6.7-liter Cummins Turbo Diesel engine with power take-off (PTO) capability for left- and right-side operation. Ram’s heaviest ...

Although the 6.7 Power Stroke Ford diesel engine is solid, the high output variation takes things up a notch. Here's what you need to know.

GM's Turbomax line of engines are some of the foremost turbo-powered diesels on the market. The 6.6L LBZ V8 is a particular favorite -- and for good reason.

This unusual 2JZ-GTE exhaust manifold is designed around a top-level racing trick for killing turbo lag: Fresh air anti-lag.

The next-generation X15 diesel is part of Cummins' new HELM fuel-agnostic engine platform, which will give fleet access to higher efficiency, lower emissions, and multiple fuel powertrain options.

The next product on Cummins' X15 fuel agnostic platform will be a next generation diesel compliant with U.S. EPA and CARB 2027 regulations.

The DOJ alleges Cummins Inc. installed hundreds of thousands of devices that can bypass emissions sensors on 630,000 RAM pickup truck engines.