Shell Spirax S4 TXM is a premium SAE 10W-30 multi-functional tractor transmission and hydraulic oil. Premium "universal tractor transmission oil" (UTTO) designed for use in transmissions, hydraulic systems, oil immersed brakes and other ancillary systems fitted to agricultural tractors and off-road equipment. Spirax S4 TXM is recognized by leading agricultural equipment manufacturers and suitable for use in most modern equipment.