I'd rather see my temp hover at 210 than 170. Too cool is damaging to the engine over time due to the contaminants in the oil....like gasoline and water vapor that will remain unburned at low temperatures. It takes heat to vaporize that stuff and get it out of the oil.
I don't even worry about it at 210...but that's just me.
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Greg Reid
Palmetto, Georgia
 
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