United Hydraulic Plus ISO 32, 46 and 68 is formulated with hydro-processed Group II base oil combined with a low-zinc, universal anti-wear hydraulic oil additive. It provides premium anti-wear, rust and oxidation performance. The additive system is balanced with high quality base oil to ensure the best combination of anti-wear, filterability, rust protection, oxidation resistance and foam resistance properties. The hydro-processed Group II base oil provides improved oxidative and thermal stability, as well as enhanced dispersancy.