Dominic,
I myself use the schaeffers 15w40 here in jacksonville fl. I totally understand what your saying about heavier viscosity and wear protection. Balance is a very important part of wear protection. lets say you go with a heavy wt oil and on startup it doesn't flow all that well but maintains excellent hydrodynamic properties when hot. Problem, lack of lubrication is some of the critical areas on startup. On the other hand, you have too thin, pumps up fast but due to the heavier heat in this area and your heavy foot, you can shear out the hydrodynamic properties very easily, problem wear during operation. As Confucius says', there must be balance between your yin and yang my son, and as in life, so must oil have a balance of flow and wear protection and this is what barrier lubes are designed for, to act as the last line of defense in wear protection when flow is interrupted.
If you get a chance, and ever make it this way, I'd like to show you first hand just how visc vs barrier lube effects wear protection.I'm not all that far from you and, if Tallahassee, about 100-150 miles tops. Give me a call sometime as you and anyone else that wants to is welcome to come by and see what I'm talking about.
This has all my numbers so you can call if you ever decide to run over here.
http://www.bobistheoilguy.com/orderpage.html
[ July 30, 2002, 08:21 AM: Message edited by: BOBISTHEOILGUY ]