Shell Corena S4 R is essentially an advanced synthetic air compressor oil designed to provide the highest performance lubrication of screw and rotary vane air compressors. This oil uses a unique advanced additive system to provide excellent protection and performance for compressors operating with an oil maintenance interval of 10,000 hours and up to 12,000 hours under certain conditions. Shell Corena S4 R is also well suited for covering applications where synthetic & circulating bearing oil or R&O oil (ISO VG 32-68) is required.