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Re: 1938 Briggs and Stratton
Posted to Castrol Forum on 5/23/2019 2 Replies

I would go with a modern straight 30W oil. Do not use a high detergent oil in these old engines. A good 10W30 oil would work fine as well. Just make sure you let it warm up before working it. Cast iron engines are reliable if you let them warm up good. Login to read more.

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