The Secret Behind Oil Viscosity

The viscosity number that you see on a bottle of motor oil can tell you how well the oil performs at certain temperatures. A lower viscosity is better suited for colder temperatures while a higher viscosity is better suited for warm temperatures. In many cases, one bottle of oil provides protection at both hot and cold temperatures.
Let's say that the bottle says 5W-30 on it. This means that the viscosity is five when the engine is cold and 30 when the engine is warm. Ultimately, it helps to keep engine parts properly lubricated whether the car is being…

