Originally posted by: madmatt1971
Spider,

Switch filters and see who much longer your oil remains clear. The dust helps contiminate the oil as part of the blow buy. Also since you have a cummings I'd recomend that up upgrade to the Proguard 7 filter element. I've got a PSD and I'd run away from the K&N as it dated by todays stds. Most high quality paper filters are infact synthetic filter media and it is very efficient and is very free flowing. IMO Race motors are a different can of worms as they are torn down more fequently than the daily driver. I've seen picture of dusted trubos on the PSDs the wear is shocking because the trubine fins are sanded off the spindel from the dust let thorugh by the k&n and the high revs they make. Just my .02

Originally posted by: sheepdogMSP8117
One of the things that I like the most about K&N is the ease of cleaning and re-oiling. Just spray the filter with cleaner, let it soak for 10 minutes and rinse. Let it air-dry and then spray oil onto it. No need to wear gloves, no need to get oil all over the place, and the filter will last forever. Even if you have to clean it more often, big deal, since it's so easy to clean.