The range includes engine oils, transmission fluids, drivetrain lubricants and various greases. Spindle oils are light mineral oils used as lubricants in textile industries. GOI trades mainly in lubricants, oils, and greases. Chevron's downstream operations manufacture and sell products such as fuels, lubricants, additives and petrochemicals. They offer lubrication at temperatures higher than liquid and oil-based lubricants operate. Typical contaminants can include solvents, detergents, grit, lubricants and hydrocarbons. The lipophilic Liquids dissolve fat-soluble lubricants or oils. Silicones are used in shaving products and personal lubricants. It was particularly noted for its range of lubricants and greases. Using diaphragms eliminates friction and need for lubricants. It is used in the synthesis of polyesters, paints, lubricants, and plasticizers. Hydraulic fluids comprise a large portion of all lubricants produced in the world. Various lubricants, such as oil, are employed. In tribology, liquids are studied for their properties as lubricants. Wintergreen oil is an ingredient in some popular vegetable-oil based lubricants used in firearm maintenance.