Shell Spirax S5 CFD M 60 is a dedicated final drive and axle oil which offers significantly improved protection for gears and bearings in bevel gears, differentials, final drives, and axles. It meets Caterpillar FD-1 final drive axle oil (FDAO) specification. Spriax S5 CFD M 60 has been developed for continuous use in extreme ambient temperatures in off road vehicles.