How does the flow rate compare to paper filters? We have run static pressure tests between our filters and paper filters (for an identical application)?
The stainless steel micronic filter flowed a consistent 7.8 times more oil for the same time period than did the paper filter (tests were run at 68 degree ambient temperature). Think about your engine during cold startup… nice thick cold oil, trying to get through that oil filter. We have read tests that reported multiple instances of oil going through the bypass valve during cold startup because of the resistance of the paper oil filter to passing the cold oil. Now think about all the crud that has had a chance to settle to the bottom of the oil pan right where the oil pickup is…. just waiting to go through the bypass valve directly to the engine components! If the oil doesn’t get to go through the filter material it doesn’t matter what the micron rating is. Another thing that could affect the paper filter is moisture. When paper gets wet it swells and may pass even less oil. Not everyone is aware that engines get condensation in them.
