Mike I think you said you had 80psi oil pressure at idle. That sounds too high and could cause problems with cold starts where a lot of engine wear occurs + oil pump drag. Thicker oil is not necessarily better, it depends on tolerances used during the engine build and its age.
For example.. http://www.onallcylinders.com/...-myths-theyre-false/
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.