If you're already convinced that your "simplest" explanation is the correct one, then why bother posting? If you think it is the oil, go dump it, reinstall the 0w-40, and see what happens.quote:
Originally posted by TheNauseator:
The simplest explanation is usually the corect one.
Simple explanations of engine behavior may give you a seductive sense of control, but they overlook that a modern internal combustion engine is an extraordinarily complex system with hundreds, maybe thousands, of different processes simultaneously influencing the output you perceive from the driver's seat. Maybe what you are feeling is the new oil, maybe it isn't. You need to gather a good bit more info before you can get past the exchange of speculation stage where I think you are now stuck.