hmmm...

ok what you need to do is compair vacume readings before and after the different filters, that way its not subjective...

now I fully believe that you can feel diferences (wont go into the playing i have done with the intake on a 940t) but fact is fact the ONLY way to get a engien to breath better is to remove restrictions from the air inlet (hence a clean filter breathes better than dirty one..less restriction, However (weirdly) a dirty (paper) filter (to a point) also FILTERS better (holes blocked with dirt are smalelr holes, hence trap smaller particles...)

so basically an engine that breathes better swallows more dirt and has shorter life....now the question is where the pivot point is in the filter arrangement that gives good breathing WITHOUT shortening the life too much..and i would imagine where you live has a bearing (lets say your local road was covered in powdered carburundum dust you REALLY would want the best filtration...)

it really is a case of you pays your money and you takes your choice...but look at removing wire screens from MAF and straightening elbows in pipes for a better (and safer) gain...alterantively wind the boost up, take the filters out, run 6" pipes and call it dragster :-) (oh and engine rebuilds very frequently so who cares about the air !)

I've owned K&N in the past. The "fun factor" is there strictly because of the noise IMO. Went back to Mann and noticed no "seat of the pants" difference. Without dyno comparisons, who really knows?

98 S70 T5-bone stock

good grief, an air filer is an air filter. K&N oil loaded, whats it going do to the MAF and ETS/throttlebody/TBM whatever(yes there are comments on this). Here in PDX after 1/8" ash after Mt St. Helens
went off I just wrapped some Kleenex(r) around the SU filters and went on. Big deal. BTW still have the '67 122s, run great even after I took a crew of scientists to the west end of St Henens '88 eruption. Only way tho I must confess, it was raining.

moron
Nazis ????? and air filters ?????
watch your language pal
and one would think that intelligent people drive volvos............

I can only conpare K&N to OEM flat filters. The K&N beats the OEM by a mile and gas milage is better also. But the air filter should have little bearing on the oil being clean/dirty, unless there is significant dirt bypassing the filter and your rings start wearing down. Most of us drive on paved roads so the particulate matter is going to be very small, and the oil on the filter helps trap those. Just remember to change the filter more often, you cannot "bang" the dust out of a K&N like we used to do with the dry paper filters :)

Klaus
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98 V70Rawd(101Kmi), 95 854T(85K mi), 75 164E(173K mi)