Much of the wear in internal combustion engines comes from the start up... where the parts in the engine have not heated up and expanded to the size they will be in the work mode..
I expect the number of ( cold) starts per mile of usage of a passenger car to a truck ( where in many instances they don't even shut them down at night due to running the ac for the driver and or the freight ) is much much higher....
Then factor in huge filters, many times better record keeping and maintenance... and overdesigning of the work surfaces and bearings in the first place.... and they are going to average lasting longer...