No problem- - - - -one of the things you'll learn about this bunch is that we really love to hear ourselves talk, (or type, actually!) Only a portion of the oil in the canister will drain back into the oil pan, since the orfice hole in the standpipe is about 2/3 of the way to the top of the canister. That accomplishers two things- - - -it takes less oil volume to fill the canister at each startup, so there's a very short time that oil pressure is reduced until the filter fills completely, and the other advantage is that most of the can becomes a sludge trap if people neglect to change the filter regularly. I've literally had to pry filter cartridges out of the canister with a big screwdriver at times- - - -they were that gummed up with sludge!
Jerry
