Just FYI, for whatever reason I have seen examples where the reported odometer mileage of a used engine was incorrect. There is no way this chassis and the board and all mounting with even original threadlocker compound as evidence on the screws was replaced. This is not the only example I've seen but the only one I thought to take a picture of when this topic has come up before of high mileage engines.
My theory is a small glitch in the sound file causes the scaling of miles to motor RPM to b massively off but yet the engine runs perfectly fine true to any other engine? Otherwise it's just some form of data corruption. That said, this engine reports the same mileage each time so this is the data the engine is reporting, not a glitch in DCS signaling back to the remote.
Just a standard starter 2-8-0 MTH Railking PS2 3V. I buy these engines just to part them out for the boards for PS2 upgrades to other engines since new boards are hard to come by. The wheels are not worn out, so again there is no way this did 13K miles.