Absolutely find it useful, the reason I bought one was because the temp gauge in the Triton is about as good as any other vehicle, that is it sits on one position until there's an "oh s&^#" situation. As we do a lot of towing and 4x4ing, I wanted to be sure I could adjust the driving to the conditions of the motor, sometimes you may think the motor's not labouring, but the temp says differently. I've got volts, RPM & boost on the other outputs, but flick through them every now and then. The other advantage is the ability to clear the occasional check engine light that will occur from the egr block. Also - when there is another code thrown for check engine, it's easy to diagnose the problem.