After talking to several people about this and getting several different answers I thought I would ask you guys what you did in your boat. Some say to put the temp sensor on the outlet line of the cooler, and some say to put the sensor in the oil pan. Putting it in the pan makes the most sense to me being as that is where the pickup is going to be getting the oil from. I think I might just run two sensors, one in the pan and one on the outlet side of the cooler. Hell, I love gauges anyways. I might just mount the gauge for the cooler outlet somewhere on the engine where it is readable but out of the way so I don't have to cut another hole in the dash. What do y'all think?