Local dealer wants 16.00 for an OEM filter. I called around and can get one for about 9 bucks less. Fram is even cheaper, but I've never been a fan of them, no do I feel they filter as well as a Napa/Wix. There is a Napa filter that will work on my unit. I know the OEM probably filters better, but for what I use this mower for ( residential) would going with something more affordable be alright? I can get two Napas for the price of an OEM and have 2 bucks left.