When I bought my ranger in september, I changed the thermostat due to it taking forever to come up to temp. I bought a Murray thermostat from o reillys. No problems for the past 9k miles. The only thing I find odd is if I park the truck after I make a long drive, get down somewhere for 15 minutes and get back in again and start it, the gauge is already on cold. Its done this since I changed the thermostat and never really gave it much thought, but I figured I'd change it to a Motorcraft one. Looking on O reillys website I see they have two different Motorcraft ones, and a few Murray ones, ranging from a 160 degree to a 195 degree. Im worried that I may have put a 160 degree one back in September, although the gauge stays in the middle. Could this have harmed my engine? It seems like the OE temp is 190-192 degrees. Is the thermost a part that would be better to go with OEM, such as the 190 degree motorcraft or would the 192 degree Murray serve me just as well?
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