Is it better to have an intake with a dry air filter or an oiled air filter? This is up for strong debate. Manufactures that use oiled air filters claim they capture more dirt particles. Enthusiasts say that the oil in the air filter can get sucked through the filter, and clog the mass air flow sensor (MAF or MAS) and cause erratic readings. Now a days, most manufactures offer a dry filter that does not need to have oil applied to it. We have had good luck with dry filters, and don't see any need to go with an oiled filter if possible.