A low sulfur marine distillate fuel trunk piston diesel engine lubricating oil composition comprising (a) a major amount of a Group I base oil or a Group II base oil or mixtures thereof; (b) at leastone or more detergents comprising at least one overbased salt of an alkyl-substituted hydroxybenzoic acid; and (c) a succinimide dispersant derived from polyalkylene having a number average molecularweight (Mn) of 1400-3000; wherein the succinimide dispersant is present at greater than 1.20 wt. % on an actives basis; and the TBN of the composition is less than 30 mg KOH/g.