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Re: 1938 Briggs and Stratton
Posted to Castrol Forum on 5/24/2019 1 Reply

A modern engine oil would be over formulated for an engine manufactured in 1938. The engine oils at this time contained very small amounts of additives or no additives. Accordingly, there are two Castrol products I would recommend for this application:

1. Ca... Login to read more.

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