chicago124's post is a little bit confusing because Limited Driver only asked about oil filter. Yes you can use K&N oil filters too but it's a better idea to use OEM oil filters like Mann & Hengst (cheaper and better)
For air filters, do not use K&N filters because their embedded oil may screw up MAS sensors ($$$). Some oil analysis also seem to show high concentrations of silicon and dirt if K&N air filters are used. So stick with regular OEM air filters.