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Old 10-03-2017, 09:34 AM
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the oil you have MIGHT be ok. Check it out. The limitations were primarily aimed at 10W-30 as it was used in the cars with catalytic converters (the source of the issue). 20W-50 may not have been impacted and thus might have sufficient levels of zinc and so on.

You may well be able to find the levels online.

20W-50 for classic motorcycles like Hondas and so on comes to mind as good. Valvoline 20W-50 Racing Oil.

If you send me a PM with your regular email address, I will send some notes I took years back from some oil guy on
a car program that went in to specific levels need for flat tappet motors.
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