Motor Oil Viscosity Ratings 101

Purchasing the right motor oil for your vehicle can be a daunting task if you are not familiar with motor oil viscosity ratings. In basic terms, viscosity is the measure of the oil's speed of flow measured with a tool called a viscometer.

Higher viscosity ratings are thicker and will flow more slowly. The number before the W on an oil label represents the viscosity at a low temperature, while the number after the W indicates the viscosity of a hot engine. As such, high viscosity numbers work better at hot temperatures and low viscosity numbers work more effectively at cooler temperatures. The majority of oils available today are multigrades, meaning the oil falls into these two temperature ratings.

To ensure your vehicle is getting the right motor oil for optimum performance and engine preservation, please visit us today at Nelson Ford in Martinsville.

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