I recently test drove Toyota Camry and some Subarus. I do not know about other car manufacturers but I noticed that these cars were not equipped with the engine temperature gauge. I was so puzzled when I first noticed it. The salesperson at a local Toyota dealer told me that in the winter, when the RPM needle goes down to one after starting the car, that is when you know the car is a bit warmed up. I was thinking, "huh?" Does it have to do with the fuel economy in the winter that people tend to warm up their cars longer than necessary? Are the cars these days designed and built to not overheat at all?