1. Reduces friction, galling and scuffing unaffected unstoppable performance in extreme heat. Increases part life.
2. Requires no clearance changes to compensate for the coating.
3. Apply to any part subject to sliding or rotating friction.
4. Excellent for use on Piston Skirts, cams, bearings, gears.
When consumers talk about viscosity, like SAE 10w30 this is really a measurement of the number of carbon atoms are in the oil component (smaller than a micron Angstrom).
SAE 10 25-35 atoms average 28 SAE 20 30-80 atoms average 38 SAE 30 40-100 atoms average 41
The oils in modern engines must operate over an extreme temperature range. They must lubricate properly from the starting temperature of a cold engine to beyond the extreme steady-state temperatures that occur within the engine cylinders.
They must not oxidize on the combustion chamber walls or at other hot spots such as the center crown of the piston or at the top piston ring. Oil should adhere to surfaces so that they always lubricate and provide a protective covering against corrosion.
This is often called oiliness. Oil should have high film strength to assure no metal to metal contact even under extreme loads. Oils should be non-toxic and non-explosive.
The higher the viscosity value, the greater is the force needed to move next to surfaces or to pump oil through a passage.
Viscosity is highly dependent on temperature, increasing with decreasing temperature. Oil viscosity also changes with shear(shear means moving oil between moving parts)(Moving the oil between engine parts causes heat were their heat you will find friction), decreasing with increasing shear. Shear rates within an engine range from very low values to extremely high values in the bearings and between piston, piston ring (piston rings has the highest friction) and cylinder walls. The change of viscosity over these extremes can be several orders of magnitude(very high start up very low at Speed).
If oil viscosity is too high, more work is required to pump it and to shear it between moving parts. This results in greater friction work and reduced brake work and power output. Fuel consumption can be increased by as much as 15%. Starting a cold engine lubricated with high-viscosity oil is very difficult.
Multigrade oil was developed so that viscosity would be more constant over the operating temperature range of an engine.
SAE 10W-30 (oh w means winter this is from the 1950s) means that at -18°C (0°F) the oil viscosity falls within the 10 weight band, and at 100°C (212°F) the oil viscosity falls within the 30 weight band. SAE lOW-30 means that the oil has properties of 10 viscosity when it is cold. SAE 30 viscosity when it is hot. This gives a more constant viscosity over the operating temperature range.
This is extremely important when starting a cold engine. When the engine and oil are cold, the viscosity must be low enough so that the engine can be started without too much difficulty. The oil flows with less resistance and the engine gets proper lubrication. Also remember that the internal engine parts are smaller when cold pistons will slap thats why thermostats are used to get engines to their operating temperature fast.
High viscosity oil in a engine designed with closer tolerances will cause improper lubrication if the oil can not adequately flow through the engine heat,wear and friction kill your engine.
Brake Horse power output from an engine is less than the power generated in the combustion chambers, due to engine friction. Two types of friction occur which result in dissipation and loss of useful power. Mechanical friction between moving parts is a major engine loss, piston motion in the cylinders being a large percentage