It is important to look at the viscosity of the oil before you put it in your car. Viscosity is defined as the thinness or thickness of a liquid. The purpose of the engine oil is to lubricate your engine. It also helps keep your engine cool. Oil that is too thin or thick will not be able to give your engine the proper protection. Make sure that you check the vehicle's owner's manual so that you can choose an oil with the appropriate thickness.
The Society for Automotive Engineers is what gives oils their viscosity rating. The rating will have a number, a letter, and another number. For example, you may see something like 10W-30. A lower number indicates that the oil will not thicken as much during the colder months. A lower number also indicates that the oil will flow more freely.
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