How to Read Motor Oil Viscosity Ratings

When you're preparing to change the oil in your car or have extra oil on hand, you may wonder what the numbers on the front of the oil container mean. Numbers like 5W-30 and 10W-40 indicate the viscosity rating of the oil, the rate at which the oil is resistant to easy flow.

Oil viscosity varies according to the temperature, and this is reflected in the rating. The former number indicates the viscosity of the oil in cold weather, while the latter number stands for the viscosity rating in hot conditions. Low viscosities help the motor oil to flow easily in cold conditions, while higher viscosities work to keep your engine and other parts protected under hot running temperatures.

Come in to Palm Coast Ford in Palm Coast, FL for friendly, experienced oil service and other maintenance. Our knowledgeable technicians can answer your questions and work to keep your car running well all year round.

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