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What does the w mean in motor oil?

Updated: 10/20/2022
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12y ago

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The 'W' stands for WINTER. It does not stand for weight. What would the oil be weighing? 12oz of 10w-30 weighs the same as 12oz of 5w-20. It is related to the cold temperature viscosity of the product. A multi-viscosity oil, 5W-20 for example, will perform like an SAE 5 product when cold and a SAE 20 product when hot. And as a bit of additional info, oils are not 'weighted' they are graded. SAE grades the oil.. SAE 5, 20, 30..

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Q: What does the w mean in motor oil?
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What does the W stand in W oil?

If you mean W as in 10W30 motor oil, it stands for Winter. The thickness of those oil changes with the temperature- they are not as thick (viscous) in cold weather, but get thicker as they warm up. Makes it easier to start the engine in cold weather.


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What does the w on a can of motor oil stand for?

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What does the w stand for in motor oil?

The "W" stands for weight. The "W" stands for winter. 5w30 is a multi viscosity oil. It acts like both 30 weight in warm weather, and 5 weight oil in cold weather.


Can you use 10W30 motor oil in a 2003 Mazda protege?

Yes, you can use 10 W 30 motor oil in a 2003 Mazda Protege. If you live in areas where the temps are very cold, 5 W 30 is recommended.


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10W-30 motor oil is recommended for the 2005 BMW X5 automobile. When the automobile is being used in extremely hot climates 10 W 40 motor oil is recommended.


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Motor oil are of different grades. density of each one will be different and hence the weight may vary accordingly.weight of 20 w 30will be lesser than that of 20 w 40


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