Patent ID: 6090760
Filing Date: 2000-07-18
Classification: C10M

Abstract:
An additive concentrate suitable for incorporation into a finished lubricating oil composition, the additive concentrate comprising:(a) a lubricating oil,(b) a lubricating oil soluble sulphurised alkaline earth metal hydrocarbyl phenate modified by incorporation in the presence of an inorganic halide catalyst of from 12 to 35% by weight based on the weight of the concentrate of at least one carboxylic acid having the formula: ##STR4## wherein R is a C.sub.10 to C.sub.24 straight chain alkyl or alkenyl group and R.sup.1 is hydrogen, said concentrate having a greater than 350 and a viscosity at 100.degree. C. of less than 1,000 cSt.