I went to go change my oil filter and oil today and im pretty sure i know where the filter is, its right in front of the oil pan and has a silver alen wrench thingy on it right? so i un did the allen wrech thinghy and oil came out but i couldnt figure out how to get the filter casing off. It was too cold out side to screw around so i just threw some oil in and left the filter in(only has 1000 miles on it) , but for next time how do i change it?>