So when does everyone change the factory filter? With the Nicktane upstream it would seem the factory filter has a lot less work to do, right?

Is 25K too long to go on the Nicktane? If not, can I let the factory go the same distance now?

i probably wouldn't go over 20k. have a friend who regulargly goes 20k, sometimes a bit more w/ no problems. also, for warranty sake i would still change your OEM filter at GM's recommended interval.


that being said, i don't change my OEM filter near that often.http://www.dieselplace.com/forum/smileys/Wink.gif