Not what you’re looking for? See more in our shop: smith_and_allan_lubricants. Smith & Allan Lubricants. Brake & Clutch Fluid. Other Oils & Fluids. Vehicle & Parts Cleaning. Do you need help or advice? Shell Corena S3 R 46 20LT. No Leak Guarantee (see below). About Shell Corena S3 R 46 20LT. Premium Rotary Air Compressor Oil. Shell Corena S3 R is a premium quality air compressor oil designed to deliver high performance lubrication of rotary sliding vane and screw air compressors. It uses an advanced additive system to provide excellent protection and performance for compressors running with oil maintenance intervals of 4,000 hours and up to 6,000 hours under certain conditions. Performance, Features & Benefits...