need to use my car. I think I definitely need to go with a oil pressure gauge though...my stock readings are off, and replacing the sending unit isn't fixing it (tested oil pressure and compared to stock gauge reading). It bothers me not having an accurate reading...so definitely oil pressure and boost. I'm fine not having a 3rd gauge...seems like most of you are suggesting 3 is overkill, but wanted to know if there was another gauge you guys absolutely thought every TT should have.