Making the rounds, are we?
http://www.toyota-4runner.org/mainte...html#post75363
http://my.is/forums/f87/mobil-1-exte...ml#post4314610
If you are quoting a manufacturer's web site or performance data, why not just say so? Why all the posts that imply this is your expertise on the issue, rather than letting the experts speak for themselves?
From Amsoil:
http://www.synthetic-motor-oil-chang...-to-synthetic/
From J.D. Power:
http://www.jdpower.com/autos/article...ic-Motor-Oils/
From Mobil 1:
http://www.mobiloil.com/USA-English/...rformance.aspx