What is the purpose of a thermostat?

[JAM1775]

Chopper.....I recall reading an article in a hot rod mag and another at the Performance Unlimited website about running cooler 160 degree temps for power with no mention of longevity consequence. This past summer I installed the 160 stat, after speaking with a Ford Racing Tech. However, your comments caused me to again call Ford Racing. Your advice is very sound because the opinion expressed today differed from my last tech call and cited chance of increased engine wear.

Today I was advised the 160 degree temps make more power but ARE more likely to cause engine wear. Synthetic oils are better but I was advised there is more engine wear just the same. I would never expect a 100,000 mile life span from my Cobra motor (I do push it around a bit !) but I am swapping back to my 180 degree stat. Any excess wear factor is not worth the risk. Especially in the coming winter months when the motor will mostly run at thermostat temp. I also inquired with another race website I seek advice from since I cannot recall the mag article . No response yet but ...guess what...not worth the risk.
So, much thanks for your comments !