The Super S Agri+Plus Tractor Hydraulic Oil (SKU 20260000) is a general-purpose SAE 20 hydraulic fluid designed for non-critical agricultural and industrial applications. It offers basic protection against wear, corrosion, and oxidation, but here's the key detail: it is not recommended for use in mobile, farm, or construction equipment. Your Cub Cadet RZT 1050 zero-turn mower uses hydrostatic transmissions that require a high-performance hydraulic fluid—typically 10W-30 engine oil or a specific hydrostatic transmission fluid depending on the model and manufacturer specs. Using a general-purpose fluid like Agri+Plus could lead to poor performance or even damage over time.