Saturday, December 13, 2008

The Five functions of Motor oil

Do you know there are five (5) basic functions that motor oil performs in your engine? Can you name them and tell a little bit about each one?















1) Lubricate and Prevent Wear & Reduce Friction


Oil must prevent the metal-to-metal contact that will result in wear to the moving parts. Moving surfaces are continuously separated by a film of oil.




2)Protect Against Rust and Corrosion

Acids formed by the normal oxidation of oil, are a potential for rust and formation of corrosive engine deposits.Corrosion inhibitors which are part of the additive package help to protect non-ferrous metals by coating them.




3) A detergent- to Keep Engine Parts Clean

Partially burned fuel will escape past the rings into the crankcase Detergents are part of the additive package to clean-up existing deposits in the engine, as well as disperse insoluble matter into the oil.

4) Cool Engine Parts

The cooling system performs about 60% of the cooling job of the engine. It cools the upper part of the engine including the cylinder heads, cylinder walls, and valves. The crankshaft, the main and connecting rod bearings, the timing gears, the pistons and other components in the lower engine are cooled from the oil flows around the parts.

5) Seals- Combustion Pressures

The surfaces of the piston rings, ring grooves, and cylinder walls are not completely smooth. Motor oil fills in the hills and valleys and greatly improves the seal. They also help with seal swelling, keeping oil from leaking out of the engine pasted seals. Stops blowby!