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.
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
Some speculate that low oil pressure at idle (as low as 8 psi by design) may contribute to these failures. 7.3The Big Short
“International did a great job on their part but Ford really screwed the pooch when it comes to everything attached... It’s pretty darn reliable but it’s always something.” Facebook · Ford-Trucks · 8 months ago 3L gas engine specifically against the ? Why We SWITCHED From Ford 7.3L Gas to DIESEL
Some 2020–2022 models experienced premature metal failure in the lifter rollers, which can destroy the camshaft and require a full engine replacement. For those who want a capable workhorse without
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.
Dirty injectors or faulty idle air control valves can occasionally cause rough idling or hesitation. Ownership Experience Reliability Concerns Some speculate that low oil pressure
The engine is frequently cited as a "beast" for towing and hauling, bridging the gap between standard gas engines and more expensive diesel options.