This is a hot topic, much like Synthetics vs Petroleum, with personal bias' entering into the mix.
The bottom line on this is, without bringing brand names into the discussion, oiled foam will out perform any other media for stopping dirt. And at the same time it will flow air ALMOST as good as oiled gauze. If you are a hardcore bomber, and don't run off road in very dusty conditions, you stand to do better with the oiled gauze. If you want to flow nearly as much air as the oiled gauze and want to stop dirt the most effectively, then use Oiled foam. Some paper filters are actually more effective at stopping dirt than oiled gauze, but is very restrictive in comparison.
I have used all the above in many different situations, from the family car, to performance cars and bikes to off-road racing vehicles, my road race bikes run w/o filters.
I agree with those here that say to grease the sealing edge on the filter, regardless which type you use.
John, as far as increasing mileage, I doubt it. I would guess the turbo would likely spool up faster, particularly if you freed up the exhaust as well, i. e. straight piping it.
Cheers
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Reformed Powerjoke owner, 2000 model, 3500, SLT, Quad-cab, 5 speed, 4. 10, 4X4, straight piped.
N7PXH
NRA member
[This message has been edited by ghillie (edited 12-21-2000). ]
[This message has been edited by ghillie (edited 12-21-2000). ]
[This message has been edited by ghillie (edited 12-21-2000). ]