abstract |
A trunk piston marine diesel engine lubricating oil composition is dispersant-free, has anTBN of 25 or greater, and comprisesn (A) an oil of lubricating viscosity, (B) an aromatic carboxylate as the sole overbased metal detergentnsuch as a calcium salicylate, and (C) an antiwear additive such as a zinc dihydrocarbyl dithiophosphatenmetal salt. |