Just a heads up, this is an older article, discussion on the Rocket III forums seems to indicate that Shell has lowered the phosphorous (zdp) level in their RotellaT recently. Possibly an issue with flat tappet cam engines.
The greatest obstacle to discovery is not ignorance -- it is the illusion of knowledge. - Daniel J Boorstin
Carpenter Racing 2010 Touring 241 hp, 185 ft lbs