Been meaning to for about 6 weeks (3 sandstorms ago!). Finally did it and the car runs so much better. Knocked about 2 tablespoons of oily grit from the K&N airfilter!!

Seems to be silly re-mapping the car and not clean the airfilter more often, but time is in short supply these days.

Good idea to have a paper filter on hand while the washed filter dries properly before re-oiling....

With the weekend near at hand, might be a good thing to do if it's been a while.

Cheers

Bas

My green one could do with a clean about now I reckon. I'll see if I can pinch some of my mate's brake & clutch cleaner stuff - Seems to work well on the filter, but is gentle enough to not damage it structurally.

Stu did recommend oxy-blue (?) as a good cleaner. The K&N came with instructions not to use brake/clutch cleaner - too harsh.

Cheers

Bas

I use a solution of washing detergent on my Green.

It's roughly what the original cleaner is and it does a good job. I try and do mine every 3k which is roughly once every 6 weeks.

I have two Green filters, which I use in rotation. The dirty one gets cleaned and re-oiled as soon as it comes out, so the oil has a long time to soak in before the filter is used again.

I also vacuum the cr@p out fairly regularly without changing the filter.

Clean them based on mileage not duration fitted. 20k for my Pipercross filter.