Roger Long wrote:

The oil flow is the lifeblood of the whole engine however and proper
viscosity is critical. Trying to pump molasses around until the combustion
and friction (engine wearing out) heat warms it up enough to flow properly
is what really screws up your engine.

In the high cam Lycomings, the molasses also doesn't get up to the cams very
well.

And to add more fuel to the fire, recall that parts of the engine receive oil by
"splash lubrication". You ever seen molasses splash? Me neither.

Russell Kent