oil dilution


oil dilution
The process of adding fuel to the engine oil just before engine shutdown to reduce its viscosity. This facilitates starting the reciprocating engines in cold weather. After the engine has started up, the fuel evaporates and the oil lubricates the engine normally. Oil dilution does not harm the engine. Oil dilution also minimizes the accumulation of sludge deposit within the engine.

Aviation dictionary. 2014.

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