| abstract |
An internal combustion engine lubricating oil composition having improved cam and lifter wear, piston deposits and / or lubricant viscosity and having a low P content, a low S content, a low sulfated ash content and a low chlorine content. A P content of 0.09% by mass or less, an S content of 0.3% by mass or less, and a sulfated ash content of 1% by mass or less, and the following additives: 0.03 to 0.07% by mass in a lubricating oil composition At least one nitrogen-containing ashless derivative of a polyalkenyl-substituted mono- or dicarboxylic acid, acid anhydride or ester as the only nitrogen-containing ashless dispersant that provides nitrogen (its polyalkenyl-substituted mono- or dicarboxylic acid, acid anhydride) Or the ester is produced exclusively from the polyalkene by a thermal “ene” reaction); at least one overbased alkaline earth metal sulfonate as the only overbased metal detergent; and at least one viscosity modifier; An internal combustion engine lubricating oil composition is provided. [Selection figure] None |