Q:

Is Motor Oil Flammable?

A:

Quick Answer

The majority of motor oils are not flammable. However, all motor oils are combustible and should be handled with caution around heat sources of any type.

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Is Motor Oil Flammable?
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Full Answer

Flammability in regards to liquids is determined by its flash point, the lowest temperature at which it can release ignitable fumes into the air. Any volatile liquid with a flash point lower than 100 degrees Fahrenheit is considered flammable. Any volatile liquid with a flash point higher than 100 degrees Fahrenheit is considered combustible. Although a handful of motor oils designed for use with motorcycles are flammable, the flash point of most motor oils is at or above 400 degrees Fahrenheit, classifying them as combustible.

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