Imagine comparing water to honey; water flows readily while honey is slow and thick. Manufacturer Specifications and Modern Engines It is vital to consult your vehicle’s owner manual before making a decision about oil viscosity.
Higher Grade Oil Better Heat Protection
This number, often referred to as the SAE rating, quantifies the viscosity, or thickness, of the oil once it has reached its operating temperature. This makes 10W-40 thicker at high temperatures than a 10W-30, making it suitable for engines that run hotter or carry heavy loads.
Conversely, oil that is too thin will fail to protect the engine under stress. Following these recommendations is crucial.
Better Heat Protection with Thicker Oil Performance
In some high-performance or turbocharged engines, a higher grade number is specifically required to handle the increased pressures and temperatures generated by these advanced technologies. The "W" in the designation stands for winter, and the number preceding it indicates cold-weather flow.
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