Method of preparing an internal combustion engine for use with engine oil substantially free of metallic and chemical friction modifiers

A process as defined in claim 6, wherein the oil is a refined petroleum motor oil.

A process of preparing internal surfaces of a lubrication system of an internal combustion engine for lubrication of the system by coating the internal surfaces of the system, the improvement comprising:

• A) adding sufficient amounts of a solvent and a perfluoroethylene resin and a mineral oil substantially devoid of metallic and chemical friction modifiers to the lubrication system of the engine to clean the internal surfaces and coat the internal surfaces with the resin when the solvent, resin and oil are circulated throughout the lubrication system when the engine is operated.

A process of preparing internal surfaces of a lubrication system of an internal combustion engine for lubrication of the system with a mineral oil that contains no metallic and chemical friction modifiers, the process comprising the steps of:

• A) adding sufficient amounts of a solvent and a perflurorethylene resin to the existing mineral oil which is substantially devoid of metallic and chemical modifiers in the lubrication system of the engine to remove oil residue from the surfaces within the lubrication system, and to coat the surfaces with perfluoroethylene resin;
• and
• B) circulating the oil, solvent and perfluoroethylene resin throughout the lubrication system for a time sufficient to remove oil residue from the surfaces within the lubrication system of the engine, and to coat the surfaces with perfluoroethylene resin.