In certain WX, it might not be possible (or advisable) to shut the main engine down. Different engines, due to the location of the dipstick, shape of the pan, etc., will show erroneous lubeoil level readings or none at all. My Lugger is equipped with a Murphy 1129 lube level switchgauge. Murphy is one of the most respected makers of these devices for the commercial marine and other industries. They make a wide variety; some of which can be configured to add make-up oil to the engine automatically. I wouldn't recommend doing that in our application. The 1129 is basically a user-adjustable high/low limit switch, attached to the engine and connected to the side of the oil pan at the bottom. It is connected via HP hose and a tee, to the same place as the oil change pump suction. The top vents to a tapped hole in the side of the lubeoil fill casting via copper tube. The switch would sound an alarm in the pilothouse if there were too little or too much lubeoil in the crankcase. John "Seahorse"