Abstract
The anti-oxidation and fuel efficiency properties of both fresh and aged oils were evaluated using a modificatory Rotary Bomb Oxidation Test (RBOT) and Pressurized Differential Scanning Calorimetry (PDSC). The fuel efficiency properties of a set of engine oils were investigated before and after the aging process. Results of PDSC and SRV indicate that the type of antioxidants, their concentrations, and the ratio of phenol to amine have great effects on the anti-oxidation capability and fuel efficiency retention of the oils. The results show that the use of molybdenum dithiocarbamate (MoDTC) in combination with ash-less antioxidants can lead to pass the Sequence VIB test for fuel efficiency and durability as defined by the ILSAC GF-4 specification.
F2012-A03-010
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Acknowledgments
The authors would like to thank the PetroChina Lubricant Company for supporting the fuel-economy engine oil research activities. This paper could not have been written without the support of the gasoline engine oil research working group. And the authors wish to thank Ms Lei Ailian and Wang Aixiang for their assistance with the SRV friction coefficient measurements and Mr Qiu jianwei and Xu jinbao for performing RBOT engine oil aging tests.
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Wang, L., Wang, L., Li, G., Xu, X. (2013). Effect of Ash-Less Antioxidants on Fuel Efficiency Retention of PCMO Containing MoDTC. In: Proceedings of the FISITA 2012 World Automotive Congress. Lecture Notes in Electrical Engineering, vol 189. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-33841-0_36
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DOI: https://doi.org/10.1007/978-3-642-33841-0_36
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