Sure one eighty, I'm just overly paranoid that someday, God forbid, I blow my little blower motor up, Some yeehaw is going to tell me that it was because I used a non recommended oil viscosity. We know that would be total crap but law school trains us to think that way to avoid future problems even if there is a small probability of them occurring. I change my own oil and my receipts are proof that I did it, and that did it right.