Hello, I am posting this question on behalf of my mother, regarding a 1994 Mazda Miata that she only drives once a week for short errands. The neighbor advised that she idle/run the engine for ten to fifteen minutes every few days to improve the health of the car. Lately she noticed the hood getting very hot during these sessions. The summer heat contributes but she thinks it is still too hot. The meter in the dashboard that gives a hot/cool reading points to just below halfway, after the engine has been idling for a while. When she drives a few minutes down the road for weekly errands the meter's dial will point to just below halfway between hot and cool, also. Is this normal? She will need to drive a half-hour trip soon and I want to be sure the car is fit to drive that far. Any help is appreciated!