I have a mechanical one because they are cheaper and I don't mind the thought of hot motor oil coming into the engine compartment. If you do mind, you should spend the extra money for the electrical one. You will need to tap the oil sender in the back anyway, so the type you get is just a moot point. You could also check out Greddy's oil filter sandwich thing they make that goes between the oil filter and the block and has several different taps for an oil feed line and oil pressure guage line.