A 0W or 5W oil flows more readily in extreme cold than a 15W oil, reducing the time the engine spends without protection. Hot Temperature Performance (The Second Number) While the "W" focuses on cold flow, the second number addresses the oil’s stability under heat.
Understanding SAE Oil Ratings and Film Strength for Engine Protection
Conversely, using oil that is too thin can lead to increased oil consumption and insufficient lubrication under load. This numerical code, developed by the Society of Automotive Engineers, directly impacts engine protection, fuel efficiency, and overall longevity, making it one of the most critical specifications to check before an oil change.
When an engine is turned off, oil drains back into the sump, leaving critical components dry. How to Choose the Correct SAE Rating Selecting the proper SAE grade is not a matter of preference but of adherence to engineering specifications.
Understanding SAE Oil Ratings and Film Strength for Engine Protection
The correct oil for your engine is determined by the vehicle manufacturer, not the retailer or mechanic. The Society of Automotive Engineers established a clear metric that measures an oil’s resistance to flow, or its viscosity, under various thermal conditions.
More About What does the sae mean on oil
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