Recent research on low HT/HS oils showed oils using salicylate detergents showed higher TBN retention even with lower starting base numbers .

Also the test oil with salicylate's and low low phosphorous outperformed the sulphonate oil with much more sulphur and phos in the anti-wear capability .

BTW ,I'm talking PCMO's here and not the oils typically associated with salicylate's in the formula .

Hint - Have you smelled your oil lately ?



Research Environment-Friendly Oils of Ultra Low Viscosity

This message has been edited. Last edited by: Motorbike,

The Cats' got their tongue

Thanks for the link. Interesting. Most of the new Low SAP/SM synthetics have a lower TBN.

This technology in part or whole is in some of the HDMO's today . Seems a particular racing oil was using 50/50 salicylate's /sulphonate .

One of the HDMO makers known for using high levels of moly has completely removed it from their formulas and are using a type magnesium to replace it .

Some of the Castrol PCMO's have used it for a good bit of time now , me thinks anyway