SAE is an abbreviation for the Society of Automotive Engineers, the organization that establishes the standards for oil viscosity. These oils utilize sophisticated polymer additives to achieve the properties defined by their SAE rating.
Understanding SAE Viscosity Ratings and Testing
The number before the W is tested at extremely low temperatures to simulate a cold start. The Difference Between SAE and API More perspective on What does sae mean in oil can make the topic easier to follow by connecting earlier points with a few simple takeaways.
The number after the hyphen is tested at the high temperatures and shear forces found in a running engine. This can lead to metal-on-metal contact, overheating, and a significant reduction in the engine's lifespan.
Understanding SAE Testing and the Viscosity Range
It simply denotes the temperature range in which the oil has been tested. In contrast, older single-grade oils, such as straight 30-weight or 40-weight, maintain a relatively consistent viscosity but are less adaptable to temperature fluctuations.
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