Oil filter Mahle or Hengst

I'd go for the Mahle or VW oil filter. Most aftermarket filters (Not sure about K&N) dont' have the check valve thingy in them...it's good for a few psi if I recall correctly...

Anyhow I would be interested in going longer drain interval, so I think that I will check out these new products Mobil is offering. Although I think the Mahle filter that has been in use is filtering well enough and the price is right at $5.

I just bought 6 MAHLE filters for my 8v, at what I think is a damn good price. The guy I bought them from (a fellow Digifanter) says this brand is the OEM filters of the new VW/AUDI/SEAT cars in europe.