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The question is, why would you want to use
automotive oil? Yes, automotive oil costs less, but compared to the cost
of your engine the difference is insignificant. Using the most appropriate
oil available, i.e. one that has been developed specifically for your engine, is
a darn good investment. The engine I plan to put in my Legacy will set me
back around $30K. Saving $20 to $25 per oil change is not worth putting
that engine at risk. Are you wondering if the current crop of automotive
oils might be superior to aircraft oil in some respects? Seems
doubtful, but I'd want to research what the experts have to say before making a
positive statement.
Tom Gourley
L2K #122
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