I am kind of gauge nerd. I love them and the information they send to you. I have a 2007 jeep commander limited with a HEMI and I would like to either add a mechanical oil pressure gauge or a electric oil pressure gauge. I am wondering if anybody has done this and what kind and the location where you installed it the passenger compartment. If you did a mechanical gauge what parts did you use. I know how its should be done since I also have classic cars which I have done this but parts are available from the restoration companies. I know to T the sending unit but not sure how what to use. My local parts store kids have no idea how to do this or the parts needed if its not a replacement part in the computer they are lost. Any help would be great and if you have pictures would even be better along with part numbers or whatever info you can give would be much appreciated.