Cooling fan mpg DRAG....??
Your attempts to gain mileage from blocking air openings in the front...hot air intake...air dam...heated fuel....195F thermostat...etc.....can be frustrated IF your cooling fan starts to run more than originally.
At the least you should consider adding a fan indicator light/LED to let you know when the fan is running. Find the fan hot wire and run a lead to the bulb/LED.
And you can install an adjustable cooling fan switch ($19 at Autozone or JCWhitney)...this can be set to switch the fan on/off up to 248F.
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Leading the perpetually ignorant and uninformed into the light of scientific knowledge. Did I really say that?
 a new policy....I intend to ignore the nescient...a waste of time and energy.
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