Originally Posted by Seminoles
Check data log for temps if it is at or above 180 then this is a good sign not going to use that much more gas. If your worried about that little bit then you should have left it alone.
It always been a known fact heat steals power think back when we use to us 160 t-stats and trick the ECU temp sensor to thinking it was running 210 by putting a 1K resistor in parallel whit it becaus no flashing or chips. Cooler engine makes more power now if we only had cold fusion. ;)
Not worried too much about fuel mileage, but cooling fan running all the time = more parasitic loss = less fuel mileage.
Running the cooling fan at a low engine temp only causes the thermostat to close more so less coolant flows through the radiator to be cooled. When the thermostat is fully opened and the radiator alone can no longer draw off the increasing heat, the cooling fan assists in the heat exchange. There is a temp range the system is designed to work in, which is around 200*f in the stock engine. Running the cooling fan at a much lower temp than that, and I think I read Injected turns it on at 175, does absolutely nothing to make the engine run cooler. A 180* stat will lower the coolant temp until the point where the cooling system with the fan running full speed can no longer control it. But even if I put in a 180* stat, I'm Still going to have the cooling fan running
uselessly most of the time until we really start warming up here.