Keith Thanks but this is a canister style that holds a cartridge style filter. This is not the spin on type easy to replace type filter. So I can release the top bolt and most will drain back but as soon as I release the bolt oil starts to flow from the bottom seal of the canister as well. Willy >Mine is that way on my Lehman 135. I just punch a couple of holes in the >top >when I start the oil change with a nail, marlinspike, or whatever's around. >The oil will drain back into the engine, and it's not nearly as messy. I >change the filter last.