Quote from eddie over at hpt....experienced tuner.....
LOL - I ran a 160* stat for about 1 year. The ECT for closed loop on a stock 2000 GTP is about 10*C, and a stock 98 GTP is about 24.5*C. These are the only 2 files I have here at work, but I can promise you that it will not stay in closed loop OR wash down the cylinders. I had no problems with fuel trims, O2 sensors, or washed out cylinders.
That being said, you will get a little more carbon buildup with a cooler thermostat. This is one of the reasons (along with the cooler temps of winter) that I went back to the 180* I run now.
