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DORETTI · May 17th, 2020, 21:15

Some old car engines require a zinc content of over 1000 ppm to protect the cam and followers, which is not found in modern oils as it may poison the catalyst.
Cheers Richard

May 17th, 2020, 21:15	#4
DORETTI New Member Last Online: Nov 14th, 2022 13:23 Join Date: Apr 2019 Location: HELENSBURGH	Some old car engines require a zinc content of over 1000 ppm to protect the cam and followers, which is not found in modern oils as it may poison the catalyst. Cheers Richard