Is this the reasoning behind K&N oiled filters?

[2013ecof150]

I really wanted to like k&n air filters but I ran them on a 04 Crown Victoria and a 06 2500hd gas truck and on both vehicles the intake tubing past the filter was covered in this extremely fine grey dust all the way to the throttle body. Swapped to paper filters and the tubes were clean. The k&n’s were new and factory oiled.

 

[Revving2Redline]

Same - many experience their filter and a flowmaster just once

I would avoid oiled filters and flowmaster/dynomax like the plague.

 

[4WD]

I would avoid oiled filters and flowmaster/dynomax like the plague.

Youthful bliss keeps them going …

 

[TiGeo]

Youthful bliss keeps them going …

What's wrong with Flowmaster mufflers? Run 2x their FlowFX line on my Passat. Budget-friendly straight-thrus.

 

[dman4384]

Technically yes, but K&N's newer recommendation to clean every 50,000 miles is too soon.

A fresh K&N does a poor job of filtering contaminants out. A dirty K&N is better for filtering, since the oiled dirt will trap more dirt.

I've never understood why it's a good ideal to use a filter that takes 50,000 miles before it becomes effective. For most vehicle's - that's 1/3 of the manufacturers engineered life!

 

[malibuguy79]

I like the AEM (k&n) synthetic dryflow filters when I need to run a cone type filter. Ive also used and AFE Pro Dry 5 on a customers car and seemed to work well (it gets limited use). Otherwise stock is just fine.

One thing I like about the AEM dryflow is after cleanings the media doesnt break down like the normal oiled K&N and retains efficiency.