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Current Trends of Passenger Car Gasoline Engine Oils in Japan - Report by JASO Engine Oil Subcommittee
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Abstract
Engines in Japan have higher output versus small displacement (bhp/liter) and require low phosphorus content in the engine oils to meet the most stringent exhaust emission regulation in the world.
The market survey of typical API SF oils in Japan showed that the average phosphorus content was approximately 0.07 %. Under such circumstances engine oils provide good performance with the usage of secondary zinc di-alkyldithiophosphates (Zn DTP) for valve train wear protection, addition of friction modifiers for fuel economy, etc.
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Takano, T., Iwai, F., and Sakamoto, K., "Current Trends of Passenger Car Gasoline Engine Oils in Japan - Report by JASO Engine Oil Subcommittee," SAE Technical Paper 861512, 1986, https://doi.org/10.4271/861512.Also In
References
- Toyota 1986 Toyota Motor Corporation 1986
- Automotive Engineering Handbook I Society of Automotive Engineers of Japan Inc. 1984
- Statistics Report on Fuels and Lubrications Production 1985 Petroleum Associetion
- Investigation for Rationalization of Petroleum Products Demand 1983 Survey on the Actual Condition of Automobile Lubricating Oil Demand in Japan by Japan Lube Oil Society