ASTM D3525 Gasoline Diluent in Used Gasoline Engine Oils
ASTM D3525 Standard Test Method for Gasoline Diluent in Used Gasoline Engine Oils by Gas Chromatography
3. Summary of Test Method
3.1 Gas chromatographic techniques are used with the sample, containing a known percentage of n-tetradecane as an internal standard, to determine the weight percent of the sample boiling below the boiling point of the internal standard.
4. Significance and Use
4.1 Some fuel dilution of the engine oil may take place during normal operation. However, excessive fuel dilution is of concern in terms of possible performance problems.
