My situation might be unique because of where I live and drive in the Arizona desert. I drive my truck regularly in parts of the desert where temps can reach 125 degrees. I use a 160 degree thermostat and my preference is the Duralast 15356 available through Autozone because it has a jiggle pin. The jiggle pin allows for air to bleed out of the system but functions as a check valve that will not allow coolant to pass when the thermostat is closed. Bought four of them last week for $23 with a text coupon available in the store that gave me $7.50 off a $30.00 purchase, basically buy three, get one free.

Old school terms for 160 degree thermostats are 'desert thermostats' or 'summer thermostats'. I run mine year round because we don't experience very cold weather where I live. In climates with hot summers and cold winters, prevailing logic was to run a 160 thermostat in the summer and a 180 in the winter.

Matt