Abstract: An improved anti-wear, high pressure hydraulic oil which contains essentially no zinc or phosphorous is described. The hydraulic oil protects against corrosion and oxidation as well as provides anti-wear, anti-weld, and demulsibility properties. This improved hydraulic oil contains (1) petroleum hydrocarbon oil; (2) esters of dibasic and monobasic acids; (3) butylated phenol; (4) phenol; (5) sulfurized fatty oil; (6) fatty acid; and (7) sulfur scavenger. This hydraulic oil has a reduced tendency towards sludge formation and has, therefore, an increased lifetime. This hydraulic oil can be used in applications requiring good boundary lubrication and minimal sludge formation. It is especially useful in high pressure hydraulic systems and pumps.

Abstract: An improved stop-leak formulation containing ground plant root material, glycol, and water is provided. The formulation can contain other additives such as corrosion inhibitors, lubricating agents, and the like. The stop-leak formulations exhibit significantly improved storage stability. Over extended storage periods, the plant root powder remains readily dispersible in the glycol/water mixture. Generally the stop-leak formulations contain 1 to 50 parts by weight plant root powder, 20 to 80 parts by weight glycol, and 100 parts by weight water. One preferred stop-leak formulation contains 15 to 30 parts by weight ginger root powder, 35 to 55 parts by weight diethylene glycol, and 100 parts by weight water.