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1938 Briggs and Stratton
Posted to Castrol Forum on 5/23/2019 10 Replies

I recently acquired a vintage garden tractor with a 4 hp Z model Briggs which runs well and appears to be very clean inside.I believe it has not been apart and is all [...] manual called for sae [...] that have been non detergent?What would a modern oil do to ... Login to read more.

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