Originally Posted by kschachn
Originally Posted by RDY4WAR
I'm not sure if it remained the same with the SN+ formula, but keep in mind that the moly content in the old formula used dinuclear MoDTC which is less effective than trinuclear MoDTC found in lower concentrations in most synthetic oils and some other conventional oils. Oil with 80 ppm of trinuclear MoDTC will have greater friction reduction than an oil with 200 ppm of dinuclear MoDTC.
Sorry, missed this reply about one compound being more effective than another, too late to alter my response above..
Note that the same applies to ZDDP as well. Secondary type ZDDP will be more effective at lower concentrations than primary type or primary/secondary blend. The same with detergents. We don't know the ratio of neutral to overbased detergents in any given formulation. It could have less neutral detergent with a higher concentration of low TBN (300) overbased detergent, or more neutral detergent with a lower concentration of high TBN (400) overbased detergent, and both give the same TBN result in an analysis, but one will retain that TBN longer and one will be more surface aggressive.
Unfortunately, ICP only gives us the table of contents, not the entire book.