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AssigneesChevron Oronite Company LLC, Chevron Oronite Technology B.V.
InventorsMenno Anton Stefan Moniz, Jeroen Van Leeuwen, John Robert Miller
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A lubricating oil composition having a sulfated ash content of from greater than 1.0 wt. % to about 2.0 wt. %, a phosphorus content of from about 0.07 to about 0.12 wt. % and a sulfur content of 0.4 wt. % or less, the lubricating oil composition comprising: (a) an oil of lubricating viscosity in a major amount; (b) an overbased magnesium detergent, in an amount providing the lubricating oil composition with at least 600 ppm of magnesium; (c) a boron-containing compound, in an amount providing the lubricating oil composition with at least 250 ppm of boron; and (d) a molybdenum-containing compound, in an amount providing the lubricating oil composition with at least 50 ppm of molybdenum, wherein the composition has a B/Mo mass ratio in a range of 2 to 10 and a S/Mo mass ratio in a range of 10 to 25.
A method of improving wear protection in an internal combustion engine comprising supplying to the engine a lubricating oil composition having a sulfated ash content of from about 1.1 to about 1.6 wt. %, a phosphorus content of from about 0.07 to about 0.12 wt. %, and a sulfur content of from about 0.2 to about 0.4 wt. %, the lubricating oil composition comprising:
Dependencies are inferred from the claim text.