Refineries played an important role in sustaining the struggle for independence.
Proclamation of Independence on August 17, 1945 with the struggle of the nation in the background.

The RI-002 arcraft as a means to penetrate the Dutch blockade used aviation fuel from PERMIRI-Jambi and PTMN-Cepu.

Arriving in Yogya from exile, President Soekarno and Vice President Moh. Hatta were picked-up with a vehicle using petrol from PTMN-Cepu.

In the beginning of 1946 R. Sudarsono was successful in putting the Kenali Asam refinery in operation. Aided by Muhamad and Sugiman he succeeded the much needed aviation fuel. This task was given to him by Col. Suyono.