A synthetic automatic transmission fluid, especially developed for new (after 1997) and older (automatic) transmissions built by Ford and GM, as well as for many other brands. It is also suitable for power steering systems, some hydraulic systems and for rotary air compressors where an excellent low temperature fluidity is required. An ‘electronically controlled converter clutch (ECCC) test’ and a ‘sprag wear test’ were added to IIIF to upgrade the DEXRON III to the latest demands.