For example, a 5W-30 oil means that the oil has a viscosity of 5 in lower temperatures and 30 in higher temperatures. The second number represents the thickness at typical operating temperature. The first number represents the thickness of the oil at low temperatures, or “winter” temperatures (hence the “W” in the oil’s name). This idea is reflected in an oil’s viscosity description. Living in either extremely hot or extremely cold climates will affect which Oil flows much easier during the summer while it thickens during the winter. Temperature & Engine OilĮngine oil acts differently based on the temperature outside. Water is thin, light, and flows much easier than thick, rich honey because it has a significantly lower viscosity than honey. Low viscosity oil flows easier and is thinner than high viscosity oil therefore, the higher the number on the bottle, the thicker the oil.Ī practical way to grasp the difference between low viscosity and high viscosity oil is comparing water and honey. Viscosity represents the measure of a liquid’s resistance to flow. Not sure what all the numbers on the oil cans mean? It’s actually quite simple: the numbers represent the viscosity of the oil. Understanding engine oil viscosity will assist you in understanding the importance of engine oil and which type you should be using in your own vehicle. There are various levels of engine oil viscosity, such as 5W-40 and 10W-30, which can make it difficult to know which one is most satisfactory for your vehicle. Using the correct engine oil can make all the difference in your engine’s functionality and your vehicle’s lifespan. It keeps metal parts from rubbing against each other during the combustion process, which helps your car get you around town as smoothly as possible. Engine oil serves as a lubricant that prevents all the car’s critical parts from breaking down. Engine oil is the heart and soul of your car’s engine.
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