| abstract |
The present invention meets the ISO 8217 2017 fuel standard for ship residue fuel and when refueling ship residue fuel having a sulfur content of greater than 0.1% to less than 0.5% by mass, during operation of a 4-stroke marine diesel engine, the A method of reducing the incidence of deposits on a piston of an engine, comprising: lubricating the engine with a lubricating oil composition, the composition comprising: (a) an oil having a lubricating viscosity of at least 50% by mass, based on the mass of the composition; (b) 5 to 25% by mass of oil-soluble or oil-dispersible alkali metal or alkaline earth metal salicylate detergent, or two or more oil-soluble or oil-dispersible alkali metal or alkaline earth metal salicylate detergents based on the mass of the composition. mixture; (c) 0.1 to 10% by mass of one or more oil-soluble or oil-dispersible ashless dispersants based on the mass of the composition; And optionally (d) 0.1 to 10% by mass of a polyalkylene-substituted succinic anhydride, based on the mass of the composition. |