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If you put in a T-stat that's too low, the computer will think the engine hasn't warmed up and it will command a richer air fuel mixture. That will reduce your gas mileage. It's never a good idea to use a T-stat that's different from factory. If you have a cooling problem, fix the problem the right way.
I'm a retired ASE Master/L-1 Technician. I still keep current with the latest automotive technology.
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∙ 15y ago
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How does changing oil effect gas mileage?
Clean oil lubricates better, it is "slicker". If the engine can spin easier, that will improve fuel economy.
Does the thermostat affect gas mileage?
Yes. Your engine will get the best mileage at full operating temperature. If the thermostat is removed or not working properly causing the engine to become too hot or not hot enough it will affect the operating efficiency or your engine which will decrease your gas mileage.
Would a bad thermostat cause a decrease in gas mileage?
A bad thermostat can cause a decrease in gas mileage. If the thermostat is stuck open, the engine will tend to run cold. Not only will this result in a perpetually low temperature gauge reading and poorly performing heater. It will also cause the ECU to richen the mixture, since the engine will appear to be warming up to the ECU. This will result in poor gas mileage. Replacing the thermostat will allow the engine to fully warm up, which will restore gas mileage as well as heater performance.
Do you have to fix a thermostat that is stuck open?
You should gas mileage will suffer otherwise
Does a loud exhaust effect gas mileage?
no
Does the idler pulley effect gas mileage?
No
Will custom wheels effect gas mileage?
No, I don't think they would negatively effect your gas milage. You just need to make sure that you keep them with plenty of air. That is what would negatively effect your gas mileage.
Can studded tires effect on gas mileage?
yes
Does old oxygen sensor effect gas mileage?
If it is malfunctioning it can affect fuel mileage.
How much do car roof racks decrease gas mileage?
Roof racks themselves have a negligible effect on gas mileage.
Do the o2 sensors effect gas mileage?
Yes.Yes.
What is the effect of changing the amount of gas in a container?
It is the force of pressure of the gas
