Originally posted by DanB:
You may have some driveability problems with a lower temp t-stat. Also, I heard years ago that some motor oil additives work better in the 180 degree plus range. Condensation/water doesn't boil off as quickly in the crankcase either, especially when cold.
A 160 temp t-stat doesn't and will never hold the temps to 160 (maybe in the dead of winter) but usually will open up at 160 to let coolant go to the rad. Normally the temp on a high perf engine with the 160 will run the same temps as a stock engine on a 195 t-stat.
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