The biodegradible mixed base oil, with appropriate proportion, could keep the high property of the synthesized base oil, compatibility and sensitivity to additives.

The correspond to oil field experience expert system knowledge base and expression have been established, positive and negative mixed inference control strategies have been designed in this system.

Unsaturated fat - Oils that are in a liquid form. They need to be mixed with saturated fats at the base oil stage in order to create a hard bar.