Yes I realised that but I reckon he was just making a blanket statement. You must admit it would be quite easy to let a DCC loco run out of oil and keep running, it could be standing in a fiddle yard or on shed or just out of view, you might have a very big layout. Better to be safe than sorry. If he didn't make the statement and you left it running oil free and it burnt out the unit, there is a good chance you'd be knocking on his door. 😆