Depends on what is in the canister. When I ran a Purolater fuel filter I could about 10,000 miles or so and it was fine. But when I run the 5 micron Baldwin PF7977 fuel filter I can only get about 5000-7500 miles since it is a finer filter and traps more crap...which is a good thing. Right now I got the 7 micron Fleetgaurd in the canister and I hope to either today or tomorrow get a 2 micron cat fuel filter put inline, when I get it on I will throw up some pictures.At what mileage do you guys change your fuel filter ? I've heard all kinds of different opinions, every 3000miles ,every 6000 miles, yearly, which mileage works best ?