[5] ASTM Standard D3524—04. Test Method for Diesel Fuel Dilution in Used Diesel Engine Oils by Gas Chromatography.
[7] ASTM E2412—10. Standard Practice for Condition Monitoring of In-Service Lubricants by Trend Analysis Using Fourier Transform Infrared(FT-IR) Spectrometry.
[8] Macián V, Tormos B, Gómez Y A, et al. Tribology Transactions, 2012. 872.