TheShell Spirax S4 AX Hydraulic Oil is a superior quality oil that provides season-long assistance. It is formulated with advanced additive technology to provide excellent oxidation and thermal stability, helping to extend the life of your machinery. This oil also has the potential to improve fuel efficiency, making it an ideal choice for those looking to save money on fuel costs. With its high viscosity index, this hydraulic oil is designed to provide reliable protection in the drivetrain gears of severely laden machinery and passenger cars. It is formulated to provide superior protection against wear and tear, helping extend your machinery's life. FleetPride is your First Click in Heavy Duty®.