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