Jabsco dilutes the heavy-duty headache of changing your boat's oil with its Engine Oil Change System, designed to give the do-it-yourselfer a professional-grade hand. The system extracts up to 50-weight oil at a temperature of 70 degress through the engine's dipstick tube. The system comes complete with a suction pump, a bucket oil receiver with a pouring spout, a 6-foot power cord and alligator clips, and a Teflon dipstick probe. Prices start at $129.