Which is NOT an advantage of filter carts?

Filter carts are commonly used in maintenance and reliability engineering to enhance the cleanliness and longevity of lubricants and oils in machinery. Among the various benefits they provide, flushing or cleaning when replacing oil allows for the removal of contaminants during oil changes, ensuring that new oil is less exposed to harmful particles. Offline filtration means that the filter cart can be used independently of the machinery, allowing for continuous filtration while the equipment is not running. Supplemental filtration adds an additional layer of filtration, effectively improving the overall quality of the oil or fluid.

Increasing the viscosity of the oil is not an advantage of filter carts; in fact, it can be detrimental. When oil viscosity increases, it may lead to reduced flow rates and increased wear on machinery components. Therefore, the primary function of filter carts is to maintain oil cleanliness and integrity without adversely affecting the oil's fundamental properties, such as viscosity.