Lubricating oil compositions

Details Lubricating oil compositions Lubricating oil compositions

C - Chemistry, Metallurgy

10

M

C10M 159/20 (2006.01)

Patent

CA 2752331

A method for preventing or inhibiting exhaust valve seat recession in a natural gas fueled engine, the method comprising lubricating the engine with a natural gas engine lubricating oil composition comprising (a) a major amount of an oil of lubricating viscosity; and (b) an alkali metal-containing detergent, wherein the natural gas engine lubricating oil composition is substantially free of each of any alkaline earth metal-containing detergents and lithium- containing detergents is disclosed.

La présente invention porte sur un procédé permettant d'empêcher ou d'interdire le retrait de siège de soupape d'échappement dans un moteur à gaz naturel, le procédé comprenant la lubrification du moteur avec une composition d'huile lubrifiante de moteur à gaz naturel comprenant (a) une quantité principale d'une huile de viscosité de lubrification ; et (b) un détergent contenant un métal alcalin, la composition d'huile lubrifiante de moteur à gaz naturel étant sensiblement exempte de tout détergent contenant un métal alcalino-terreux et détergent contenant du lithium.

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