![]() The filter media is what traps dirt particles from unfiltered oil. This allows the oil to flow to the engine even when the filter is clogged or when the oil is too thick to flow through the filtering element. Once oil pressure rises inside the filter, the coiled spring is pushed downwards, allowing the bypass valve to open. It is, therefore, no wonder that Wix filters 95% of particles at 20 microns, while K&N filters only 85% at 20 microns.Īdditionally, both Wix and K&N use coiled steel loaded bypass valves, which are more efficient than stamped metal in relieving oil pressure inside the filter. This makes K&N oil filters perfect for high-performance vehicles whose engines require a faster supply of filtered oil.Ī higher flow rate, however, is often indicative of a less efficient filter medium. K&N oil filters have a higher flow rate than Wix, which can be attributed to their long history of involvement in the racing arena. It should also allow the oil to flow even when the filter is clogged or plugged. To avoid engine starvation, the filter media should allow steady oil flow while still efficiently filtering out contaminants. Good oil flow is one feature that should not be overlooked when choosing an oil filter for your vehicle. ![]()
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