Oil & Gas Issues
for old engines
Bruce Fuhrman & Doug Prince
Most of our Corvettes use original designed engines while some have been upgraded to engines featuring roller tappet and roller rocker arms. The original engines used flat tappet and essentially flat surfaced rocker arms. These latter flat tappet engines used rubbing to interface between the tappet bottom and the camshaft lobes. This is a friction surface. Old oils contained ingredients which provided lubrication and reduced wear on the cam lobes. “Energy” issues and the modern roller/rocker engines do not need these lubrication ingredients because of the reduced friction of the roller design.
The following is a seminar discussing the oil that we should use with a flat tappet design.