The Meaning Behind Oil Viscosity Numbers

If you don't know what the numbers on the oil jug mean, don't feel bad. Many people don't have a clue what the difference is between 10W-30 and 0W-20 motor oil. Those numbers refer to an oil's viscosity - or how much resistant there is to flow.

The lower number before the W is the oil's viscosity at cold temperature. The lower the number, the better the oil will flow at cold temperatures. The second number is the viscosity at high temperature. The higher the number, the thicker the oil will be at high temperature. In cold weather, you want an oil with a lower first number. In summer, you want an oil with a higher second number.

If you have questions as to what type of motor oil is best for your vehicle, come to Grainger Nissan in Savannah, GA. The Nissan service department staff can help you choose the right motor oil for your car.

Categories: Service