My girlfriend has a 2010 Mazda3 2.0 4 banger and her air filter is yucky. Same one since she bought it 20k ago. I have a mustang with a CAI and a JLT oiled air filter, so I dont know much about the paper cheapo filters. What are some good ones I can find at local stores? I know most of you here seem to dislike K&N, but I had mentioned that to her because its rechargeable. Anyways whats a decent air filter I can find locally that wont brake the bank? Thanks