i have been using k&n filters but i was told that they only work good on dino oil and i should use a Mobil 1 filter if im using synthetic oil also while on this topic how long does every one run there synthetic oil
IMO K&N filters aren't worth what you pay for them. I have never used a Mobil1 filter, but if they are as expensive as the K&N they better do a much better job than the K&N do. I don't know if the Wicks high end filter is good for synthetic, but I have heard nothing but good things about them. I didn't run mine long enough before tearing my engine down to form a good opinion.
There is a whole lot more to oil than what was covered in that discussion. If you really want serious detail about oil (or any engine fluid for that matter) search for posts by Bror Jace (I think that is how he spells his handle) on honda-tech. They guy knows tons about everything fluid in cars.