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Development of Ultra Low Viscosity 0W-8 Engine Oil
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 14, 2020 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Further fuel economy improvement of the internal combustion engine is indispensable for CO2 reduction in order to cope with serious global environmental problems. Although lowering the viscosity of engine oil is an effective way to improve fuel economy, it may reduce the wear resistance. Therefore, it is important to achieve both improved fuel economy and reliability. We have developed new 0W- 8 engine oil of ultra-low viscosity and achieved an improvement in fuel economy by 0.8% compared to the commercial 0W-16 engine oil. For this new oil, we reduced the friction coefficient under boundary lubrication regime by applying an oil film former and calcium borate detergent. The film former increased the oil film thickness without increasing the oil viscosity. The calcium borate detergent enhanced the friction reduction effect of molybdenum dithiocarbamate (MoDTC). By applying these technologies, an engine oil was developed which successfully achieved desired fuel efficiency and reliability. The developed oil also met the new JASO GLV-1 specification.
CitationYamamori, K., Uematsu, Y., Manabe, K., Miyata, I. et al., "Development of Ultra Low Viscosity 0W-8 Engine Oil," SAE Technical Paper 2020-01-1425, 2020, https://doi.org/10.4271/2020-01-1425.
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