Provide your own links. Any I would provide would be argued endlessly for their validity anyway. Depending on whose info you believe M1 had a tick over 60% of the market in 2000. From one report alone it is estimated that Castrol's Syntec product alone has dented M1's share by double digits. If the market share was not being impacted by "boutique" and mainstream synthetic products you would not see a new synthetic oil product pop up almost monthly. Do you really think for a second M1 would have produced the "extended life" 15K mile oil were it not for losses they were feeling to others such as Amsoil? This product has 50% more "supersyn" than the regular M1 offering. Maybe Supersyn is a $10 word for PAO.