Get your truck ready for the long road with improved AC performance, with the OTR Medium Viscosity PAG 100 Refrigerant Oil with Expertise Built In™. With a medium viscosity, this replacement refrigerant is the ideal option to lubricate an AC system's compressor, while working to reduce overall humidity. Manufactured with a premium blend to decrease the need for frequent fluid changes. FleetPride is your First Click in Heavy Duty®.