I couldnt find this info on mobil1's website so i thought i would ask it on here. How long can you use a mobil1 oil filter? I have a 04 chevy tracker zr-2 with a v-6 engine. The oil i am using is amsoil series 2000 0w30 with the mobil1 ep oil filter. The oil only has 3500 miles on it. The oil and filter have been in the engine for 6 months now. Is there a time limit to keep this filter in use? thanks