My car has been really sluggish since the spring time is getting closer to the end...and heading into summer. I was first blaming it on the humid weather Georgia has been having for so long. I went to change my battery and noticed holly crap that Stillen filter is really dirty so.....
10 bucks- K&N Filter cleaner kit
I went throught the whole process and man that thing was a mess from all the pollen. The car pulls 100% better now...it was dying at around 4k it was really week on the highway too. If you've got any of these syptoms and your air filter is grey instead of the oiled red look I suggest you clean it, It will be well worth your time

 

How many miles has it been since you last cleaned it, or if it was new how many miles ago did you put it in.

 

i cleaned mine last night after 25k miles and i used it in a cold air application. dont notice much difference just a little better throttle response

 

I've had mine on for about 15K, I think I will wait a little longer before cleaning mine. I live in San Diego and depending where you go, it can some times get pretty dusty. I will probably do it around 20k.