CLEVELAND OPEN CUP TEST (ASTM D92)
The Cleveland Open Cup Test (ASTM D92) measures flash and fire points of an oil. This test is intended for fluids having a flash point of 175 ° F (79.4 ° C) and above. A fixed volume of fluid is heated at a uniform rate while open to the atmosphere at its surface. A small flame is passed over the surface at uniform temperature increments to determine the point at which vapors ignite. This temperature is recorded as the oil’s flash point. At a somewhat higher temperature, self-sustained burning for at least five seconds determines the fire point.
AMSOIL Advantage
High Flash and Fire Points – AMSOIL synthetic lubricants display high flash and fire points, meaning they are highly resistant to breakdown at normal operating temperatures. They offer more protection than conventional oils because they resist oxidation and thermal breakdown, retaining their pumpability and heat transfer abilities.
OilBuddy’s Take
In other words, the Cleveland Open Cup Test Method simply measures the flash and fire points of oil. The higher the flash and fire points are, they make oil more resistant is to break down.