need to know what size cam you have & what valve springs. if its a stock or mild cam without heavy "race" type springs & is fully broken in, you dont "need" to use an additive. most modern oil levels are fully capable of supporting these types of cams & most have 800-900+ppm of zddp & other anti wear additives. also need to know how much zddp the additive adds since too much is not good.
you can also do a search on here or many other sources as this subject has been covered numerous times with very long threads. bobistheoilguy has hundreds of actual oil analysis that show whats in most modern oils to help make a educated decision on what oil to use.
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