I find tightening it by hand works fine, (both hands) the vortex of oil flowing clockwise through the oil filter cannister, serves to tighten it further, over time...have you ever taken one off and thought,"I'm sure I didn't creak it up that tight when I put it on"! the last oil filter element I fitted was a K&N and they have a hex head on the end, so you can (over)tighten them with a socket!!!!
