Dirty injectors or faulty idle air control valves can occasionally cause rough idling or hesitation. Ownership Experience
This is a notable trade-off. Expect roughly 8–10 mpg while towing and 12–14 mpg unloaded, regardless of the load's intensity. Reliability Concerns 7.3The Big Short
For those who want a capable workhorse without the complexity of DEF or DPF systems, the 7.3L is highly regarded, though it requires a tolerance for high fuel costs. Dirty injectors or faulty idle air control valves
The engine is frequently cited as a "beast" for towing and hauling, bridging the gap between standard gas engines and more expensive diesel options. Reliability Concerns For those who want a capable
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.
While marketed for its longevity, some early owners have reported significant internal issues:
Some 2020–2022 models experienced premature metal failure in the lifter rollers, which can destroy the camshaft and require a full engine replacement.