[POWERSTROKE]

This will NOT be a popular post to this topic. But, a properly engineered and serviced dry pleated paper air filter will filter out 99% of the dust/dirt before it enters your engine. A oiled cotton gauze filter, aka K&N or equivalent seldom get over 95% of the dirt. They are designed to be used on engines in off-road race car or truck or motorcycle engines. They were were designed so the thick film of oiled dirt would fall off the surface of the filter so the filter does not restrict air flow Into the engine. The increased dirt the engine didn't matter since the engine only runs a maximum of 500 to 1000 miles between rebuilds.

Now, if you don't have an open mind, stop reading this post right now. I've spent hours and hours researching published efficiency ratings by oil bath air filter manufacturers. Nobody prints them. The companies ALL print dry pleated paper filter element spec's, and oiled cotton gauze specs. The best info I have found is from VORTOX Air Technology, they claim "Up to 80% removal of dust/dirt" with their oil bath filters. I don't think anything comes with oil bath filters anymore. They don't work well with turbo-charged engines, huge self-propelled combines harvesting corn, soybeans, small grain crops like wheat, oats, barley, etc operate in choking clouds of dust, huge two stage, filter inside a filter, dry pleated paper filters need to be cleaned, serviced, replaced daily, sometimes twice a day. Oil bath air filters would not work. My two IH Farmall tractors, a '51 and '54 vintage both have Donaldson oil bath filters and I'm switching them both over to dry pleated paper filters someday when I find the right filter housing.

If I had a V-6 in good shape I'd have a paper filter on it. They were used 50 years ago because we didn't have anything better. Now we do. So, those of you that didn't heed my warning, Flame away like all the old farmers on the other forums I post on just because their brand new 1940 vintage tractor had an oil bath air cleaner, "They gotta be good". No, they don't!