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If you are going to be in heavy traffic or stop and go, then differntly 'yes'. What is the cost? Can you afford the cost? An older Chevy I had had only an idiot light. The temperature, while towing, went over 230 and the light still didn't come on. If you can find the place to put a temperature gauge, ( I mean finding a place to add the sensor in the engine without removing another sensor) then try an do so.
I am related to an engineer and engineer really don't put in un-necessary items in cars. In additional to the added cost of the item, there is the whole engineering aspect of design, placement, bringing in electricial to run the device.
Ted
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