Patent ID: 7928043

Claim:
A method of lubricating a cylinder liner of a marine diesel 2-stroke engine comprising: (1) monitoring performance characteristics of said engine; (2) selecting a lubricating composition to modify the performance characteristics of the engine, wherein the lubricating composition is prepared by in-situ controlled blending of at least three different fluids, said fluids comprising: (i) a first fluid comprising an additive package with one or more over-based detergents, and optionally other performance additives; (ii) a second fluid comprising an additive package with one or more neutral detergents or overbased detergents, and optionally other performance additives, with the proviso that the first fluid has a ratio of Σ(wt % of overbased detergents)/Σ(wt % of all additives in the fluid) greater than the second fluid; and (iii) a third fluid comprising an oil of lubricating viscosity, wherein the oil of lubricating viscosity is new system oil, used system oil, or mixtures thereof; and (3) supplying the lubricating composition of step (2) to the engine.