Patent ID: 7960318
Filing Date: 2011-06-14
Classification: C10M,C10N

Abstract:
1. A lubricating oil composition, comprising: a lube base oil comprising at least one of a mineral oil and a synthetic oil; an ashless dispersant comprising at least one of a boron-containing derivative of an alkenylsuccinic acid monoimide and an alkenylsuccinic acid monoimide and at least one of a boron-containing derivative of an alkenylsuccinic acid bisimide and an alkenylsuccinic acid bisimide; an antioxidant comprising a dialkyldiphenylamine compound and a hindered phenol compound, the dialkyldiphenylamine compound being present in an amount of 0.3 to 2.0% by mass of the composition and the hindered phenol compound being present in an amount of 0.2 to 2.5% by mass of the composition; wherein: the ashless dispersant is present in an amount of 0.01 to 0.14% by mass of the composition in terms of nitrogen content; the at least one of the boron-containing derivative of the alkenylsuccinic acid monoimide and the alkenylsuccinic acid monoimide is present in an amount of 0.05% or less by mass of the composition in terms of nitrogen content; and a sulfated ash of the composition is 1.2% by mass or less.