The problem with using a re useable oiled type air filter is that once you use it for any length of time and clean it dirt is transferred to both sides of the air filter during the cleaning process. Which is them sucked into your engine.
I've used re useable air filters for years on motor cycles and even went as far using a degreaser, compressed air and even an ultra sonic cleaner, completely clean the air filter.
No matter what I did or how many times I cleaned the filter, once the filter was dry and shaken over a clean white sheet of paper, dirt would come out.
This led me to switching back to a stock disposable filter element, this gave me confidence that no fine dirt or particles would be sucked into the engine.
Stock disposable air filters also have better filtering ability than the re useable oil type.
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