SA Lube's Castrol Transmax Z is a high quality full synthetic transmission fluid. It is particularly recommended for use in automatic and semi-automatic transmissions used in buses and coaches. It may also be used in manual transmissions. As such it is recommended for fleets employing a mixture of Voith, Renk, ZF, Allison and MB transmissions alongside the Leyland Pneumocyclic and Hydracyclic units. Extended oil drain [120.000 km] in ZF Ecomat, MB AT and Voith AT. (20 Litres)