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Old 10-03-2017, 08:48 AM
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you should be able to look up the additives to any oil you are considering, and thus take the guesswork out of it.

You can also simply buy a container of additive and do something like one container per oil change. See

https://zddplus.com/ (good background reading here)

Hemmings will sell you their version all set to go:

https://www.hemmings.com/classic-oil/20w50

John
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