Lubricating fluid for internal combustion engines fueled with alternative combustion fuels having high auto-ignition temperatures

A method of lubricating an internal combustion engine when fueled with a hydrogen fuel having an auto-ignition temperature greater than about 700K to mitigate abnormal combustion events, the method comprising:

• lubricating a crankcase of an internal combustion engine with a lubricating oil composition and combusting a hydrogen fuel having an auto-ignition temperature greater than about 700K in the internal combustion engine;
• and
• wherein the lubricating oil composition includes (i) one or more base oils of lubricating viscosity and (ii) a detergent system including (iia) at least one overbased metal-containing sulfonate detergent providing about 2 to about 8 mmol of metal to the composition;
• (iib) at least one neutral to low-based metal containing sulfonate detergent providing about 0.02 to about 0.2 mmol of metal to the composition;
• (iic) at least one overbased metal-containing phenate detergent providing about 2 to about 4 mmol of metal to the composition and wherein the mmol of metal is relative to a 100 gram sample;
• and wherein the lubricating oil composition has a total base number (TBN), measured pursuant to ASTM D2896, of at least about 9.5.

An internal combustion engine configured for combustion of hydrogen fuel, the internal combustion engine comprising:

• an engine crankcase lubricated with a lubricating oil composition;
• the lubricating oil composition includes (i) one or more base oils of lubricating viscosity and (ii) a detergent system including (iia) at least one overbased metal-containing sulfonate detergent providing about 2 to about 8 mmol of metal to the composition;
• (iib) at least one neutral to low-based metal containing sulfonate detergent providing about 0.02 to about 0.2 mmol of metal to the composition;
• (iic) at least one overbased metal-containing phenate detergent providing about 2 to about 4 mmol of metal to the composition and wherein mmol of metal is relative to a 100 gram sample;
• and wherein the lubricating oil composition has a total base number (TBN), measured pursuant to ASTM D2896, of at least about 9.5;
• and
• hydrogen fuel.