- Joined
- Dec 30, 2006
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- 29,558
I was looking at M1's product guide pdf at M1 EP in all the various viscosities. The 0W20 has 650 phospherous and 750 zinc, whereas all other viscosities have 800 phospherous and 900 zinc. BUT,the 0W20 EP HM has the 800/900. I'm just curious as to why this is?