How to Choose Oil Viscosity?

Answer Viscosity refers to the thickness of a liquid. Motor oil viscosity is rated according to standards set by the Society of Automotive Engineers (SAE). Higher numbers indicate a thicker oil. Oil rated... Read More »

Top Q&A For: How to Choose Oil Viscosity

Viscosity of Used Oil vs. New Oil?

Many drivers know they must periodically change their vehicle's oil, but some car owners may not understand why the oil does not last forever. As the vehicle runs, the oil's viscosity changes and t... Read More »

How to Cut Oil Viscosity?

Every bottle of oil has a viscosity rating. For example, 10W30 oil has a viscosity of 10 when cold and a viscosity of 30 when heated up. The higher each number, the thicker the oil. Many people mix... Read More »

What Is Oil Viscosity?

Oil is rated by the Society of Automotive Engineers (SAE) for viscosity. Viscosity is a rating which describes the thickness of a fluid. Engines are designed to use oil rated at a certain viscosity... Read More »

How to Measure Oil Viscosity?

Viscosity is a measure of a fluid's resistance to flow. Viscosity increases at higher pressures and varies inversely with changes in temperature. Water has low viscosity and pours easily while oil ... Read More »