Hi I was wondering if any one puts a light film of oil on your foam pre filter on your air filter? This is the one that is before the air filter i was in wallmart yesterday and looking in the lawn and garden center and they had a foam pre filter that had a stamp on it that said don't oil this foam pre filter and i have never sean that before so i was wondering if i should be oiling my foam pre filter or not?Just wondering what the rest of you do with this?:laughing: