Some Field Data and Future Trends in Diesel Passenger Car Engine Oils in Japan

The rapid increase in the number of diesel passenger cars in Japan has resulted in renewed interest in the development of improved engine oils.

This paper describes the factors affecting this development and includes the following topics:

1. 1)
   Current quality of diesel passenger car engine oils
2. 2)
   Drain intervals and used oil properties
3. 3)
   Future performance requirements
4. 4)
   Properties of Japanese diesel fuels