Quote:
Originally Posted by Mark R
I'm not interested in oil samples. I change the oil long before it reaches its capacity to suspend contaminants.
I'm interested in clean filtered air that will not introduce dust and dirt into my engine. The study, for anyone who would care to actually read it, uses standardized dust, in a machine designed to measure amount of contaminants passed and air pressure drop due to the filter getting clogged. They simply put all filters under the same conditions, and see when they clog up to the same point, how much dirt they pass before they clog, and how much dirt they trap at the point of clogging.
Pretty simple. Conclusion: if you want the air to be filtered, use the stock filter, otherwise, you will get worse filtering performance.
http://www.billswebspace.com/AirFilterTest.htm |
Oil will suspend contaminates immediately after you change it. So you don't drive the car AT ALL?
Pretty simple. Conclusion: If you want to know if you're passing dirt into your engine, do an oil sample and see for yourself. Paper or oiled cotton will not matter if you're not driving your car in the sand dunes or off-road.