well I replaced mine the other day and it was after about 2 y e a r s . Yes that is right have been watching the fuel pressure and it has only dropped 3 psi so . I found in the filter 2 pin head size peices of yellow paint and about a dozen grains of sand. the filter was clean no clay or other on it. So as I have always maintained that if you buy clean fuel it is cheaper in the long run. From the truck stops they aren't going to put up with wet dirty fuel.