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Cars Trucks -N- More
Engine Oil: Oil is the protector of your engine. It reduces friction, lessens wear, provides lubrication, forms a seal between the pistons, rings and cylinder walls and helps cool engine parts. Without the cleaning action of new oil, carbon and varnish buildup would be toxic to the engine. And engine oil even dampens the shock and noise of moving parts.
Synthetic oils: Synthetic oils contain additional chemically compounded lubricants that provide:
Oil filters: Oil filters are designed to trap dirt and other suspended objects in the oil and prevent them from getting to the engine bearings and other parts.
Automatic transmission fluid: This is an oil used in transmissions that lubricates and cools the transmission and transfers hydraulic pressure to shifts gears automatically.
Brake fluid: This is the hydraulic fluid used to transmit pressure through the brake lines in a brake system. Brake fluid also contains anti-corrosion additives that help protect hydraulic components like brake calipers and Anti-Lock brake pumps.
Coolant/antifreeze: This is the mixture of water and antifreeze used in a car’s cooling system to maintain the engine's temperature throughout its operating range.
Air Filters: Air filters remove harmful airborne particulates so they are not introduced to an engine’s combustion process.
About the oil classification system: Every bottle of engine oil comes with an indicator of its viscosity. This is its ability to flow under certain conditions. In a multi-grade oil, the first number indicates how the oil will flow when it is cold. The lower the number, the lighter the oil and the better it will perform at lower temperatures. The second number indicates the thickness of that same oil at high temperatures. For example, a 5W-30 oil will flow as a 5-weight oil at zero degrees Fahrenheit and as a 30-weight oil at 210 degrees Fahrenheit.