Just cleaned my S&B filter for the 1st time, using the S&B clean and reoil kit, @ 15k miles. The filter did not look "dirty", but I was surprised how much 'stuff' came out, and the end result was a much cleaner filter than the K&Ns I have used before.
I did contact S&B, using the GS W2455 part number, FYI, use 68 grams of oil.

Rating: [5 of 5 Stars!]