Yes, 208degF is what you want.
Most Ford engines use 192-195degF t-stats
180degF will slowly ruin the engine.
A working thermostat doesn't cause an engine to run Hot, it makes it run in the "normal" temp range for best MPG and best lubrication, for current gas engines that is 195-220degF.
While a 180degF t-stat may sound better, it isn't, your MPG will go down and contaminants in the oil won't be burned off as well.
SAE, the guys that rate and test motor oil found contaminants(water/blow-by) start burning off at about 160degF(coolant temp), but at 190+degF contaminants are burned off faster and better.
T-stat sets Minimum operating temp, it's job is to get engine to 200degF(in this case) ASAP, and then keep engine at 200degF.
So if you are driving in a Minnesota winter at -20deg the t-stat may never open trying to keep engine temp at 200degF
With a 180degF t-stat engine and heater would be below operating temp.
If you are driving thru Death valley in the summer at 100+ deg the t-stat would be open all the way trying to keep engine temp at 200deg
A 180degF t-stat would be open all the way too, so upper temp would be exactly the same with either.
So a lower degree t-stat doesn't "help" anything, it just costs you money in MPG and long term in repairs.
Last edited by RonD; 05-23-2014 at 10:06 AM.