Quick question regarding the various filters for a 2007 Santa Fe. In looking at the service log, it indicates changing the Air Cleaner Filter. When calling Pep Boys, they indicate there are 2 air filters. Can someone expand on this? I was looking at the simple pleated one... or so I thought, (Similar to KN 33-2378), or PB/Purolator's version. Also what is meant by a 'fuel tank air filter'???