Originally Posted By: irongoat
Sounds like you are shooting your cap gun from the hip. Do your research before you wise crack.
Rotella oil has a very high detergent content. Keeping naturally occurring abrasives in suspension is ok on diesels due to the large surface areas on the crankshaft, however on lawnmowers and other small engines it's not advisable to send these particles to wear surfaces especially to the plastic cam lobes in many late model engines.
Iron, have you seen or repaired failures that were directly attributed to your theory?
I can see your point if the engine was horribly neglected, somehow only run on a non-detergent oil, then was switched over to a detergent oil. Other than that, pretty much all engine oils have detergency to them, regardless of rating.