For a diesel engine the paper is better as the air pulled by a diesel will pull the oil off of the oil coated filters and allow too much dirt in. Gas engines don't have as much air flow and the oil coated should work well. Now if you have an older style oil bath filter it is better for filtration but may give you a little higher restriction to air flow. Just remember that dirt destroys engines so the best filter keeps the most dirt out while allowing the most air flow with the least restriction.
2000 F250 4 x 4 88,000 miles as of 05/11/2009, conventional cab, longbed,Reese rail system gooseneck hitch
synthetic motor oil
six speed manual transmission.
AIS intake, 4" turbo back Magnaflow S/S exhaust
inlet & outlet pyrometers & boost gauge
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