In 2026, Ford’s 6.7L Power Stroke diesel outpaces GM’s 6.6L Duramax L5P in raw output and towing capacity, while the Duramax retains an edge in smoothness, fuel efficiency, and ease of maintenance.
Think Chevy's legendary 6.6L Duramax is the undisputed king of heavy-duty towing? Here are three rival diesel engines that make even more power.
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