This is what the K&N site says,
"K&N air filters typically can go 30,000-50,000 miles before requiring
cleaning.You would generally have to change a paper filter 3 to 5 times
during this same distance."
Maybe during war times the K&N needs cleaning every 10k?
Alexander van Gerbig -- '88 Audi 80
The Audi 80 Pages-----------------------
http://surf.to/the80pages.com
Katonah, NY 10536