Smoke reducing additive for two-cycle engine lubricant-fuel mixture comprising the Hofmann decomposition products of a quaternary ammonium hydroxide

A process for reducing smoke emitted from a two-cycle engine which comprises:

• (1) mixing a distillate fuel with from about 1 to about 3 vol. % of a lubricating oil basestock to produce a fuel-oil mixture
• (2) heating a quaternary ammonium hydroxide having the general formula:
• ##STR4## wherein R.sub.1 is a hydrocarbon radical or a hydroxy terminated radical having from 1 to 24 carbon atoms, R.sub.2 is a hydrocarbon radical having from 1 to 24 carbon atoms, and R.sub.3 and R.sub.4 are hydrocarbon radicals having from 4 to 24 carbon atoms, wherein R.sub.1, R.sub.2, R.sub.3, or R.sub.4 optionally contains a nitrogen atom, an oxygen atom, a sulfur atom or mixtures thereof, or a mixture of quaternary ammonium hydroxide having the general formula (I) to a temperature sufficient to decompose said quarternary ammonium hydroxide to the Hofmann decomposition products thereof,
• (3) adding to the fuel-oil mixture from about 0.1 to about 5 wt. % based on weight of lubricant in the fuel-oil mixture of an additive comprising the Hofmann decomposition products of the quarternary ammonium hydroxide, and
• (4) operating the two-cycle engine with the additive containing fuel-oil mixture.