Toro Hypr-Oil 500 is a high-performance hydraulic fluid formulated and approved by Toro engineering for commercial zero turn and stand-on mower hydraulic systems. The 5-gallon commercial bulk pack is designed for fleet operators and service shops performing multiple machine hydraulic fluid changes. Maintaining the correct hydraulic fluid on schedule protects pumps, wheel motors, and other hydraulic components from accelerated wear. Refer to your operator manual for the correct change interval and capacity for each machine. Do not mix with other hydraulic fluids.