I find my temperature gauge to be a valuable and reliable "Relative" indicator. Regardless of the actual, there is a normal rage (the baseline). If it's hot out, it's a bit higher (fine). If it's REALLY hot out, it's even a bit higher (fine). If it's not hot out and it's consistently and significantly above the baseline (or even the level for a hot day) something is not working efficiently and it's time to take a look.
I prefer this over most cars I have owned that have a temp needle that never moves, I question that they are even connected.
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