Originally Posted By: ChrisD46
While the Lubrication Design link was better than what ARCOgraphite suggested - it still doesn't answer my questions . The Blackstone report is better - but still doesn't tell me which of the additives is for cleaning and which is for wear protection ? ** My ultimate purpose is to compare ingredients in motor oils side - by - side to better evaluate those that may be better at cleaning versus those that may favor wear protection or friction modifiers more .
When you mouse-over the elements in the [censored] link, it says whether the element in question is a wear metal, contaminant, or oil additive, and if an additive, whether a detergent, dispersant, or anti-wear.
The only things I have to add to the [censored] descriptions are that Ti is being used now as an anti-wear additive, and that Na is sometimes used as an additive as well (though I don't remember its purpose).
Many additives, such as viscosity index improvers and friction modifiers, don't show up in a used oil analysis.