When shopping for your car’s engine oil, you must know the oil's viscosity. It is a property that helps in determining the thickness of the oil. Oil with low viscosity tends to move and lubricate your engine parts smoothly and efficiently. If you want to buy ideal engine oil, it must have a viscosity that is neither so thin to slip through parts easily or so thick that it barely flows.
Unfortunately, the viscosity of oil changes with temperature changes between areas. A single viscosity rating, also called oil’s weight, only shows the oil flow when the temperature is warm. Thus, if you want to start your car’s engine during the winter season in Bremerton, WA, the oil will flow slowly compared to the summer season. A multi-grade rating offers you both the cold and hot viscosities of oil. Thus, the W in 10W-30 stands for winter.