LOW SULPHUR, LOW SULPHATED ASH, LOW PHOSPHORUS AND HIGHLY PARAFFINIC LUBRICANT COMPOSITION

摘要

The present invention relates to a lubricant composition having a sulphur content of from O.Ol to 0.3 wt. %, a phosphorus content of- from O.Ol to 0.1 wt. % and a sulphated ash content of from 0.1 to 1.2 ^vt. %, based on the total weight of the lubricant composition, which comprises a base oil or base oil blend, wherein the lubricant composition has a kinematic viscosity at 100 of more than 5.0 mm^/s (cSt), a cold cranking simulated dynamic viscosityjat -15 according to ASTM D 5293 of less than 9500 mPas (cP) and a mini rotary viscosity test value of less than 60000 mPas at -20°C according to ASTM D 4684, and wherein the base oil or base oil blend comprises a continuous series of iso-paraffms having n, n+1, n+2, n+3 and n+4 carbon atoms. The invention relates further to the use of the lubricant composition, for the reduction of piston ring deposits in an internal combustion engine.