Hey Hank...I have a 27' Sportcraft with a 5.7 liter mercrusier inboard. ( new in 05)...I'm interested in permently installing a small 12 volt oil transfer pump in the oil system.( for ease of oil changes.).. On the port side of the engine block there are two 5/8" hoses that leave the lower engine and feed the oil filter, then back to the engine block.. My question is... can I install a pipe nipple and "T" into the lower of the two hose connections(where it leaves the engine block) and install a ball valve in line with the suction side of the transfer pump??? what are your thoughts on this??? Also (perhaps a subject for another post) your thoughts on synthetic vs conventional oil or blends?? thanks captd