I'm running an Aeromotive filter with 10 micron media, mounted on the rear cross-member (directly behind the differential). Last night I was cruising and noticed the car leaned out big time under boost (yikes!). At first I thought the wideband O2 sensor was bad, but it seemed to be reading fine the rest of the time and wasn't throwing any codes (it's an Innovative wb). Anyway, I swapped the filter today and it's fine...the filter only had 10k miles on it. Lesson learned: change your filter often! Does anyone think 10 micron is overkill? Should help keep the injectors clean longer.

 

Maybe the lesson here is that if you use a filter with too fine of a "screen" it's going to clog rather easily. Maybe it's better to let a few microscopic impurities get through than court disaster with a lean out condition that blows your entire engine.

 

It's an optimization issue, of course. I don't really mind changing the filter element every 5k miles or so because it's super easy to get to the way I have it mounted (the stock location is pure hell), but I'm surprised it loaded up that fast

http://www.aeromotiveinc.com/products.php?prod=178
http://www.aeromotiveinc.com/products.php?prod=182

btw, if you're thinking of buying one of these to replace the crappy stocker, definitely consider their new filter with a shut-off valve; prevents spilling gas all over the floor
http://www.aeromotiveinc.com/feature12331.php