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Re aviation vs automotive oil.
I am no expert but I remember reading somewhere
that aviation oils have anti- foaming agents. That is all I know. As a kind
working in a garage and service station environment; I remember that there were
several types of petroleum products designed for specific uses and
applications. I suppose that aviation and automotive oils are also
designed for their unique applications. This may support the need to use
aviation oils in our lycoming and continental engines.
As an aside, anti-foaming agents may also be in
some automotive oils: I can neither affirm nor deny this
statement.
As for me, the oil issue in a lycoming engine has
been resolved by the years of history, testing, and actual experience and use of
proven products as well as appropriate bulletins regarding the recommended oils
to use. This gives me a certain peace of mind knowing that that element of
a complex aircraft need not be explored for a more satisfactory solution by
me. This allows me to concentrate on other aircraft components such as
loose aileron hinges, etc.
It is an interesting question, you pose, and
perhaps an expert in petroleum products may have some knowledge to impart to us
which may support our continued use in aviation oil.
Bob Smiley
N94RJ
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