Looking beyond the viscosity rating, you will often see API certifications like SN or SP, which denote performance standards regarding cleanliness and protection. The first number, like the "5" in 5W, shows the oil's viscosity when it is cold; a lower number means the oil flows more easily, reducing engine wear during startup.
Cold Weather SAE Oil Guide: Understanding Viscosity Ratings for Winter Performance
These oils utilize polymer technology to provide the benefits of two different viscosities in one product. These oils utilize polymer technology to provide the benefits of two different viscosities in one product.
Furthermore, the color of the oil or the inclusion of so-called "performance additives" does not necessarily correlate with a higher SAE rating; the correct choice is dictated by the engine design and operating environment. It is vital to consult your owner’s manual to ensure the selected oil meets the exact requirements for viscosity, certification, and service life to avoid voiding warranties or causing damage.
Cold Weather SAE Oil Guide: Understanding Viscosity Ratings for Winter Performance
A common myth is that a higher number always equates to better protection. Selecting the Right Oil for Your Vehicle Making an informed decision requires looking at two key factors: climate and driving habits.
More About What does sae mean oil
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