Oiling Pre Filters

[RED-Z06 2,706]

I use PJ1 foam filter oil, its sticky so no drip off like motor oil, I can get 100+ hours of mowing out of a paper element and have barely any dirt on it..Just the finest of fines...but the foam sleeve will be packed every 8-10 hours.  Its worth doing, the less dirt that hits the paper, the better

 

Edited 16 hours ago by RED-Z06

[clueless 3,347]

On 2/4/2026 at 11:52 AM, Achto said:

 

I usually spritz it with light coat of K&N filter oil. I've had the same can for about 6yrs.

 

https://www.oreillyauto.com/detail/c/k-n-engineering/k-n-engineering-12-25-ounce-air-filter-oil/kan0/990516

 

I check it over at oil change time. If it looks dirty then I grab the K&N cleaner, spray it down, scrub, rinse, and re-oil. Again, this stuff goes a long way, think my cleaner bottle is about the same age as the oil.

 

https://www.oreillyauto.com/detail/c/k-n-engineering/k-n-engineering-1-quart-oiled-cotton-air-filter-cleaner/kan0/990621

That, what been using for years, just about out of my first can. I quit using it for my truck when I had two mechanics that I respect tell me the stuff put a bit of a coating on my MAP which probably negates the higher volume of air the air filter delivers.