What Does the W Stand for in 10w30?

Answer

In 10w30, the letter W stands for winter. The SAE (Society of Automotive Engineers) launched a series of viscosity classifications at both 100 and at 0 degrees Celsius. When there is a 'W' in the SAE classification, it means the oil is rated for low temperature use. The SAE 10W30 meets the requirements for 10-weight oil at cold temperatures as well as 30-weight oil at high temperatures.
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Q&A Related to "What Does the W Stand for in 10w30?"
winter
http://wiki.answers.com/Q/What_does_the_w_stand_fo...
The 10 is the "weight" of the oil when it is cold, W. means winter, 30 is the weight
http://www.chacha.com/question/what-dose-10w30-sta...
The "W" in 10w30 stands for Winter, and means that the first number...
http://www.chacha.com/question/what-does-the-w-in-...
Weight is what people usually think of, but it's "winter.". Those oils are rated for winter use.
http://answers.yahoo.com/question/index?qid=200905...
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