Quantitative Analysis of Fuel in Engine Oil

엔진오일 내 연료성분 정량분석

  • Received : 2017.09.28
  • Accepted : 2017.10.25
  • Published : 2017.12.10


The contaminated engine oil by fuel can intimidate driver safety due to vehicle problems such as engine abrasion, fire and sudden unintended acceleration. In this study, we investigate various functional properties of the engine oil contaminated with fuel. The test results indicated that the engine oil contaminated with fuel had relatively low values of the flash point, pour point, density, kinematic viscosity and cold cranking simulator. Furthermore, a four ball test suggested that the contaminated engine oil increased wear scar due to the poor lubricity. Moreover, SIMDIST (simulated distillation) using ASTM D2887 was applied to analyze fuel characteristics in an engine oil. The SIMDIST analysis result showed a lower carbon number, and the fuel was detected at an earlier retention time than that of using engine oil in chromatogram. Also, it is possible to quantitatively analyze for fuel contents in the engine oil. The SIMDIST method for the diagnosis of oil conditions can be used whether the fuel was involved or not, instead of analyzing other physical properties that require various analytical instruments, large volumes of oil samples, and long analysis time.


  1. Korea Automobile Manufacture Association,
  2. S. Matsuo, K. Takami, and H. Yamamoto, Influence of properties of diesel fuel on diesel engine performance, J. Soc. Automot. Eng. Jpn., 58(11), 89-94 (2004).
  3. Y. K. Lim, S. Y. Ham, J. M. Lee, and C. S. Jeong, A study on the change of physical properties of engine oil after vehicle driving, J. Korean Soc. Tribol. Lubr. Eng., 28(2), 93-98 (2012).
  4. C. S. Bae and Y. J. Jung, Fuel economy improvement of automotive engine, Auto J., 34(1), 39-45 (2012).
  5. H. G. Kim and C. K. Kim, Experimental study on the tribological characteristics of diluted engine oil by diesel fuel, J. Korean Soc. Tribol. Lubr. Eng., 21(4), 156-164 (2005).
  6. C. K. Kim and H. G. Kim, Experimental study on the viscosity characteristics of diluted engine oils with diesel fuel, J. Korean Soc. Tribol. Lubr. Eng., 24(1), 1-6 (2008).
  7. T. Sagawa, H. Fugimoto, and K. Nakamura, Study of fuel dilution in direct-injection and multipoint injection gasoline engines, SAE Technical Paper, 2002-01-1647 (2002).
  8. The Ministry of Commerce, Industry and Energy, Korea, Business act for quality standard, inspection method and inspection fee of petroleum product, 2011-203.
  9. Newstapa, Sudden unintended acceleration, (2017).
  10. V. H. J. M. Santos, E. D. C. Bruzza, J. E. Lima, and R. V. Lourega, Discriminant analysis and cluster analysis of biodiesel fuel blends based on fourier transform infrared spectroscopy (FTIT), Energy Fuel, 30, 4905-4915 (2016).
  11. K. J. Jeon and S. R. Yong, A study for analysis method of fuel dilution content in engine oil with TGA-DSC, Korean Society of Automotive Engineers Fall National Meeting, 801-806 (2008).
  12. Y. K. Lim, J. E. Lee, Y. G. Na, J. R. Kim, and J. H. Ha, Change in physical properties of engine oil contaminated with diesel, J. Korean Soc. Tribol. Lubr. Eng., 33, 45-51 (2017).
  13. ASTM D 445, Standard test method for kinematic viscosity of transparent and opaque liquids and calculation of dynamic viscosity.
  14. ASTM D 5293, Standard test method for apparent viscosity of engine oils between -5 and $-35\;^{\circ}C$ using the cold-cranking simulator.
  15. ASTM D1298, Standard test method for density, relative density (specific gravity) or API gravity of crude petroleum and liquid petroleum products by hydrometer method.
  16. KS M ISO 2592, Determination of flash and fire points-Cleveland open cup method.
  17. ISO 3679, Determination of flash point-Rapid equilibrium closed cup method.
  18. ASTM D 2500, Standard test method for cloud point of petroleum products.
  19. KS M 2021, Testing methods for oxidation stability of internal combustion engine oil.
  20. ISO 20623, Petroleum and related products-Determination of the extreme-pressure and anti-wear properties of fluids-Four ball method.