Manufacturers provide specific guidance that is tailored to the engineering tolerances of the engine. Choosing the correct grade ensures the oil can reach all parts of the engine quickly during a cold start and maintain a stable film strength during extreme heat.
Understanding SAE Viscosity Ratings and What They Mean for Your Engine
These numbers are not arbitrary; they are tested against strict standards set by organizations like the SAE (Society of Automotive Engineers). Understanding the specific requirements of your engine ensures longevity and optimal performance under various driving conditions.
Modern multi-grade oils are engineered to provide the protection of a thin oil when cold and the stability of a thick oil when hot. Look for the "Capacities" or "Lubrication" section, which will list the exact oil weight and the total capacity required for an oil change.
Understanding SAE Viscosity Ratings for Your Vehicle
In many cases, a higher viscosity oil, such as switching from 5W-20 to 5W-30, can help reduce oil consumption and maintain oil pressure in older engines. High-mileage formulations are specifically designed with conditioners that swell seals to prevent leaks, which is a common issue in vehicles with over 75,000 miles.
More About What weight oil does my car take
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