So I have a 93 Ford F 250 Diesel 7.3l. I have a problem with oil filters "staying in the block". Everyone i put on the truck ends up leaking. I honesly do not know whats going on. The filters are tight when i put them on. When i change the filter i put oil on the seal and fill the filter up about half way with oil. Then i put it on and snug ut up and then follow the instructions for how far it needs to be turned once the seal is snugged up. I have tried Fram filters and Napa Gold filters to see if with one or the other it would not leak. But it does. Also i know this can happen if the seal doesnt come off the block wich in this case the seal always comes off with the filter. And the filter is not thread is not STRIPPED at all filters screw on very easly and spin right up to the block Could my seal surface be messed up? If the surface is messed up how should i go about fixing it? I think this is a very odd problem but i do not know if it was common on this engine.