Recently read on a site where they recommended replacing the fuel filter at 12K. Then I started thinking when was the last time I replaced my fuel filters and I couldn’t remember. I do recall the one for my wife’s Buick was spendy, but everything on that car was spendy. I replace my fuel filters when they look old and cruddy and can’t remember the last time I replaced them. I always replace them when I replace a fuel pump which I have only had to do once in recent memory and that was due to a bad bearing not foreign material the filter was not plugged or even dirty, I did cut in half to check it. I checked several manufactures sites and they all had different intervals suggestions to replace the fuel filter. I do use only brand name high grade fuel, at the present Mobil; I have never had a filter problem or even a thought that it could be causing a problem. Maybe I just been lucky but for now I am going to stick to my current schedule for replacing the fuel filter. I do check it now and again with my lab scope but have never seen a problem. I do recommend periodic replacement as electronic fuel pumps are not cheap and it is good insurance against failure. I don’t think I could afford, even doing the work myself, to adhere to some of the service schedules some shops are recommending. I had over 200K on my wife’s Buick and 120k on my pickup and have never had a serious problem, knock on wood, I probably will now.