Lubricating oil composition

Details Lubricating oil composition Lubricating oil composition

C - Chemistry, Metallurgy

10

M

C10M 137/10 (2006.01) C10M 129/54 (2006.01) C10M 163/00 (2006.01) C10M 169/04 (2006.01)

Patent

CA 2163206

A lubricating oil composition having a total base number of 2 to 13 and comprising (A) 0.04 to 0.12 % by weight (in terms of phosphorus), based on the whole composition, of a zinc dialkyldithiophosphate, (B) 1.0 to 3.0 % by weight of a calcium sulfonate (TBN 200 to 300) and 0.3 to 2.5 % by weight of a calcium salicylate (TBN 10 to 100) and (C) 50 to 2,000 ppm (in terms of molybdenum) of sulfurized oxymolybdenum dithiocarbamate containing group having 8 to 23 carbon atoms.

L'invention concerne une composition d'huile lubrifiante présentant un indice de basicité compris entre 2 et 13, et comportant (A) 0,04 à 0,12 % en poids (exprimé en terme de phosphore), sur la base de la composition totale, d'un dialkyldithiophosphate de zinc, (B) 1,0 à 3,0 % en poids d'un sulfonate de calcium (indice de basicité 200 à 300) et 0,3 à 2,5 % en poids de salicilate de calcium (indice de basicité 10 à 100) et (C) 50 à 2000 ppm (exprimé en terme de molybdène) de dithiocarbamate d'oxymolybdène soufré contenant un groupe hydrocarbyle présentant 8 à 23 atomes de carbone.

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