Tonga Used Oil Management Plan

Abstract

Motor oils are used in internal combustion engines or associated mechanical parts. Their main function is lubrication of moving parts, but they also clean, inhibit corrosion and cool the engine by transferring heat. Motor oils are derived from petroleum-based and non-petroleum synthesised chemical compounds. Similarly, hydraulic fluids are low compressibility oils that transfer power in hydraulic machinery. Common hydraulic fluids are also based on mineral oils.