You can use purple power/simple green/etc to clean it, and then ATF to re-oil it. I did this for years back in the day when K&N filters actually did pass more air than the factory paper filters; do it now with a foam filter in my bike and the lawnmower.
- 2003 GT, UPR X, FRPP 24lb/h, Magnaflow, PP 70mm TB & plenum, Delta Force tuned,
Steeda UDPs, Ralco flywheel, RAM HDX clutch, 3.73s, 262 rwHP/305 lb-ft.
New ride (7/1/2013) 1998 Mercedes SL500-5.0L 32V VVT 326/347 HP/tq