What % of an oil is base, and what % is additives?

Patman

Staff member
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Oakville, Ontario
As the title is asking, I am wondering what the ratio of base oil to additives is in a typical oil? Is it 80% base oil/20% additives? 90/10? 70/30?
 
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3,321
Location
Bolivia
80:20 is generally correct, but the better the bast oil, the less additives to do the same job. Hence the synthetic would not need VI improvers, Pour point supressors, and certain other things. Actually depending on the purpose of the oil, it varies from 1% to 25% additive.
 
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