Fuel Dilution

Fuel dilution is the amount of unburned fuel present in an engine lubricant. Most commonly associated with clogged or malfunctioning fuel injectors or fuel system assemblies, excessive fuel dilution reduces lubricity, lowers lubricant load-carrying capacities and increases the probability of a crankcase fire and/or explosion. Fuel dilution is most accurately measured by gas chromatography and is reported in % volume.