Short — 7.3the Big

Some speculate that low oil pressure at idle (as low as 8 psi by design) may contribute to these failures.

It handles large loads—like a 16,000 lb fifth-wheel—effectively, though users note it lacks the high-torque "grunt" and exhaust braking of engines like the 6.7L Power Stroke. 7.3The Big Short

Some 2020–2022 models experienced premature metal failure in the lifter rollers, which can destroy the camshaft and require a full engine replacement. Some speculate that low oil pressure at idle