Patent ID: 6610637
Filing Date: 2003-08-26
Classification: C10M,C10N

Abstract:
A lubricant suitable for use in a diesel engine, comprising:(a) a synthetic base oil composition, said base oil overall having a kinematic viscosity of at least about 4.8Ã—10âˆ’6m2/s (4.8 cSt) at 100Â° C. and a viscosity index of at least about 110; (b) a dispersant-viscosity modifier; and (c) a saligenin derivative represented by the formula wherein X comprises â€”CHO or â€”CH2OH, provided that when m is 1 or greater, one of the X groups c an be hydrogen; Y comprises â€”CH2â€” or â€”CH2OCH2â€”, and wherein such â€”CHO groups comprise at least about 10 mole percent of the X and Y groups; M is hydrogen, ammonium, or a valence of a metal ion, R1 is a hydrocarbyl group containing 1 to about 60 carbon atoms, m is 0 to about 10, and each p is independently 0, 1, 2, or 3, provided that at least one aromatic ring contains an R1 substituent and that the total number of carbon atoms in all R1 groups is at least 7.