When shopping for motor oil, you may have come across the term S.A.E number on the bottle. But what does this number actually indicate?

The S.A.E number, which stands for Society of Automotive Engineers, is a numerical code that represents the viscosity of the oil. Viscosity is a measure of a fluid's resistance to flow, with higher viscosity oils being thicker and flowing more slowly than lower viscosity oils.

The S.A.E number is typically followed by a 'W', which stands for winter. This indicates the oil's viscosity in cold temperatures, with lower numbers indicating better flow in cold weather. For example, a 5W oil will flow better in cold weather than a 10W oil.

After the 'W' rating, there will be a second number which represents the oil's viscosity at operating temperature. Higher numbers indicate thicker oils that are better suited for high temperatures and heavy loads, while lower numbers indicate thinner oils that are better for cold weather and light loads.

For example, a common motor oil rating is 10W-30. This means that the oil has a viscosity rating of 10 in cold temperatures and 30 at operating temperature.

Choosing the right S.A.E number for your vehicle is important for ensuring proper lubrication and protection for your engine. Consult your vehicle's owner's manual to determine the recommended viscosity for your specific make and model.

For more information on motor oil viscosity and the S.A.E number, check out this helpful guide from Mobil Oil.

Remember, using the correct S.A.E number for your vehicle can help improve engine performance, fuel efficiency, and overall longevity. So next time you're shopping for motor oil, pay attention to the S.A.E number on the bottle to ensure you're getting the right product for your car.

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