[s_wilwerding]

There are numerous other posts about the thermostat, with people falling on both sides. The people who like them like that the engine runs at a lower temperature, and they believe that leads to longer life. The people on the other side state the engine runs at a lower temperature than it was designed to, which leads to higher emissions and dirtier oil, and may not prolong the life of the engine.

I fall into the second camp, but if you do a search, you'll see plenty of pros and cons of either approach.