Google for what? You must have diligently spent time looking for the
first link (or are you from Australia). Not easy to find.

Here is an interesting extract from it (the second link is not all that
useful)
"...dry vacuum pumps .... have been a source of continual premature
failure...."

Better fix that oil leak.
Who said I didn't? But you still refuse to acknowledge the point that
an oil leak could develop that you or your mechanic DO NOT KNOW ABOUT
and you are taking a risk. And as you said, Rapco (and others) already
know how to fix the problem.