Guys,
Since my rebuilds, I'm slowly crawling toward the 20 hour mark, and I'm going to change the oil at that time.
I've had lots of success with synthetic oils in my personal vehicles (anything from a Dodge Ram to a fully prepped BMW race car). I know there are plenty of opinions (informed and otherwise) out there, but I'm looking for some scientific evidence as to why I shouldn't run something like 20W50 Amsoil Race oil in my engines (twin 350 Magnums, with camshaft, intake, exhaust and valve work done).
Boat spends all it's lifespan on the great lakes (mostly Georgian Bay and Lake Ontario), and water temperature is generally high 40's to mid 50's.
Any ideas?
Pat