When doing a oil and filter change on my 617 engine, is there a easy way to drain the oil that is leftin the lines to the oil cooler? With those lines being lower than the point where they atttach to the filter I assume old oil stays in there. Also, is it nesecary to remove the oil line to the oil pressure gauge for drainage?

 

The oil being black right after a oil and filter change is what made me think i wasn't getting all of the oil out and that I should take extra measures.
I guess i won't worry about it.