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yes it is ok, but if you live in a state with srict emission laws like California it will not pass the emission test in the winter time

On some Computer Controled Vehicles if the Engine runs 2 cold it won't go into CLOSED LOOP & will use major Quanities of Fuel.On SOME HIGH Perforance Computer Chips they Require U 2 change 2 a Colder Thermostat.

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Q: Is it ok to run a cooler thermostat than is called for?
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If you have got a 190 degree thermosat in your car if you put a 180 degree thermostat in it will the car run cooler?

Thermostat will open sooner car may not necessarily run cooler


If you have a 190 degree thermostat in your vechile and replace it with a 180 degree thermostat will it run cooler?

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It will run cooler, be inefficient and wear more quickly.


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A stuck open thermostat will cause a car to run cooler than needed. It will cause oil to sludge, a loss of gas mileage due to running rich and numerous other problems.


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