1. SCOPE

1.1 This standard prescribes gas chromatographic techniques equipped with flame ionization detector and programmable oven to determine fuel dilution of used gasoline fuel engine oils. A sample containing a known percentage of n-tetra decane as primary standard is used to determine the weight percent of gasoline fuel in the sample boiling below the boiling point of the primary standard.

1.2 This test method measures and indicate the fuel dilution of the engine oil during normal operation. Fuel dilution of the crankcase oil retards the performance of the engine oil however in normal performance some fuel dilution may take place.