yer kidding right? its not straight weight oil. If you have a fleet... makes it much easier to use 1 oil. Car, bikes, trucks, genny, lawnmower...I never understood what it was about Rotella that makes people think it is a good bike oil. Is it not a diesel pickup truck oil?
:-? ?:-? ?not sure its a bright idea to use regular rotella in a duramax diesel....but thats just me.
id certainly expect some ridiculous results from an oil analysis place after doing so.
I personally use delvac in my diesel.