I am soon going to be installing my oil temp. gauge and I have been having so trouble finding a how-to or any information on it. I found a how-to on pressure gauge on mazda6tech, but I couldn't find anything with oil temp. I told the shop if it's going to cost a lot for labour to just scratch the wiring, and just wire the power to it. He wants to know if you have to drill into the oil pan, or any other way that you can get the sensor in there? Thanks for the help guys.