Lower temp stat does nothing for engine life. engines are actually calibrated for higher temp. if you dont reprogram the ecu for the new therm will not see any change in performance. can actually hurt performance becuase truckwill never go to closed loop mode..CynicX said:oh hell ya i know you can make em fast and its a good base to start from but mine is probably gonna stay stock.....i want to get all the life out of it i can.....what does a lower temp t-stat do? does that help engine life any?