What degree Thermostat?

The benefit is lower engine and engine compartment temps. The benefit of the compartment temps is obvious.....easier on wiring, hoses, plastic, etc. The benefit of lower engine temps is less likelyhood of a cracked exhaust manifold or vaporlock and a running temp father from an overheat temp....it just gives you a little more cushion under extreme conditions or if you have a sudden cooling problem out on the road. The only benefits of the higher temp thermostat that I can think of offhand is lower smog emissions and a higher output heater.