After an A/C tuneup, the local shop suggested the cooler 87 degree thermostat. If the cooling system was working OK, this would keep the engine operating temp down, possibly avoiding the typical stop and go traffic temperature-creep-with-the-AC-on that occurs here in Austin. However, lowering the op temperature will reduce gas mileage too.
Which thermostat makes sense here? I am getting ready for major routine maintenance including changing the timing belt, hoses, rad flush, T'stat replacement, etc., so I will be buying some new parts. I would rather buy a three-row radiator or external ATF cooler, if extra capacity is what is needed.
Any comments or experiences?
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