What do the Numbers on Motor Oil Stand For?

When you're looking through the selection of motor oil options available at the store or during an oil change, you may wonder about what the numbers on the front of the container mean and how they impact your car. These numbers, like 5W-30 or 10-W40, indicate the oil's viscosity rating.

Viscosity is a measure of the motor oil's resistance to flow, and it varies according to the temperature. The two numbers are separated by a "W," and the first number indicates viscosity in low temperatures while the latter number notes the viscosity amid a hot engine. Lower viscosity ratings are important in cold weather to keep things running well. On the other hand, high viscosity is helpful when running a hot engine.

Visit Nissan North in Worthington for friendly, knowledgeable oil service and other maintenance for your vehicle. Our technicians can provide advice and information about the best oil options for your vehicle.

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