TOP SECRET Economic 8. Supplies of Aviation Spirit to the Nationalist Air Force. In April, 1949 stocks of aviation spirit in Formosa were estimated at 35/40,000 tons, since when additional shipments have been received. For operational purposes present stocks of 100 octane are considered sufficient to last one year at present consumption rate, and the only shortage would appear to be one of 72 octane for primary training aircraft. Stocks of aviation spirit in Chusan are unknown but they have adequate means of supply from Formosa.