but the new amsoil filters (both of them). today it was brought to my attention that they are letting dust in the filter intake tube, one customer had one on his truck for 10k and mine had about 20k both had dust in the intake tract, amsoil recommends once a year or 25k filter cleaning and i figured i would do that. well my customer just daily drives his truck so there is no excuse for that. maybe they need to be cleaned every 8-10k or so. this is very important for those that just bought new filters, thanks 
