A lubricant composition suitable for fuel injected two-stroke cycle engines includes an oil of lubricating viscosity, an amount, sufficient to reduce or prevent piston scuffing, of a mixture of(A) at least one phenol selected from (A-1) an aminophenol and (A-2) a reaction product of a nitrophenol and an amino compound, and (B) at least one Mannich dispersant, amine dispersant, nitrogen-containing carboxylic dispersant, or ester dispersant. The composition further includes an amount, sufficient to reduce degradation of the lubricant composition upon exposure to oxygen or oxides of nitrogen, of a nitrogen-containing inhibitor, a hindered phenol inhibitor, or a sulfur-containing organic inhibitor.
一种适用于燃料喷射式二冲程循环发动机的润滑剂组合物包括具有润滑粘度的机油、一定量的足以减少或防止活塞擦伤的以下物质的混合物:(A) 至少一种选自(
A-1)
氨基苯酚和(A-2)
硝基苯酚与
氨基化合物的反应产物的
苯酚,以及(B) 至少一种曼尼希分散剂、胺分散剂、含
氮羧基分散剂或
酯类分散剂。该组合物还包括一定量的含
氮抑制剂、受阻
酚抑制剂或含
硫有机
抑制剂,足以减少润滑剂组合物在暴露于
氧气或
氮氧化物时的降解。