Originally Posted by JoshBoody
Well, that may be so, but you need certain amount of TBN remaining in the oil for it to protect effectively from the acidifying effects of blow-by gasses. Mobil1 just drops to near zero after 3000-4000 miles, meaning: your oil becomes too acidic.
Other issues I've seen is higher content on fuel dilution, resulting in much lower oil flash point. Just bad juju over all.. "