I escort Oversize Loads and average between 80-100k miles per year. So far, I’ve replaced….
2- AC blower motors, 1- cruise control switch, 1- oil pressure sensor, spark plugs @ 386k(still useable).
Parts damaged from escorting…
Driver’s headlight, although both need replacement now due to excessive pitting and sand blasting…
Windshield washer reservoir
I easily get 100k out of the tires. The drivetrain and engine have never been touched. Only oil, filters and tire rotation every 7500 miles.