Two examples:
Installed a hour meter in the Ford Ranger back in '94.
Calculations result to between 35-40 mph ave.
Mix of city and highway driving like 40/60. The mix affects ave. mph.
More idle time like in city driving =less mph.
So we will buy the 33-40 numbers. For a car.
However
My Yale electric 6000# cpy forklift at work has electronic readouts of hyd. pump hours and total hours.
If the 40mph cal is used, it means it has been driven (4000 hr x 40=) 160,000 miles?
NO WAY.
It is a well maintained, nice machine, well built, runs great.
Even using a more real 3 mph ave comes to 12,000 hilo miles.
Round trip NYC to Californey 2 times on a hilo in 4 years! Owww.
But if used as 12,000 car miles-well the car was driven REAL HARD and will be junk at only 50,000.
Wearwise, it IS like a well maintained car with 160,000 on it. Like a 160,000 truck? ehhh..maybe a pickup truck. Like 160,000 on a semi, railroad engine, aircraft-no.
Odometers and hour meters generate numbers.
How the number is used varies widely to determine wear, etc.