Thought I would do a search on the WWW since I changed out the OE rating thermostat last summer thinking it might help while I was towing. Now that colder temps have arrived, I noticed my guage staying low. With short trips becoming common, I pondered (and did) reinstalling the OE stat. Yes I already changed out the 10yr old radiator, and figure the pump is next. I flushed the system in both directions before the change over. The thermostats operate just fine as ffar as I can tell, though I'm wondering about the OE temp guage as a few have reported on another board with this car. Check the link out. The graph looks interesting, though I'm not sure the parameters of the test other than rated cylinder wear and the maintained coolant temp. http://www.carnut.com/ramblin/cool3.html What does one think the wear is mostly attributed to - oil viscosiy, additive activation temperature, thermal expansion (improper part fitment)? Just curious as usual.