To further your point...I just typed this up a little bit ago.
Granted it's my opinion...so go ahead and pick it apart for those who disagree. I don't care:
I like a cooler running motor and having the piece of mind knowing its running a tad cooler, plus...15* isn't a drurastic enough of a difference. Going from a 195* to a 180* is ideal, but drilling T-Stats isn't my thing either...I run a 160*. I don't like my motor getting hot. The heat works great in the winter...don't have to wait for it either; people claim it "takes forever"...When I'm sitting in traffic it still is getting up to around 180*-ish. Cruising on the highway it still sits around 170*-180*. I think one of the bigger aspects you guys are missing is the fact that the motors still run 10-20* more than the rating of the opening temp for the thermostat...so your 195* stat'd car is seeing temps well over 210*...and the factory fan turn on point is what, 212*? And people wonder why the factory plastic manifolds and gaskets fail over time...I'll be my typical hard headed self and take my "increased wear" and "crappy MPG's" over a heat soaked 3800 mess anyday. Old motors...old technology. Colder T-Stats, junky copper core spark plugs, high octane fuel. They work...I like the ideas. Just like DHP PCM's...proven over the years, tried and true.
Like Cop likes to say...you can do it that way, but there are other ways to go about doing things. I like my ways, you have yours. But don't go editing this thread and taking out the colder thermostat information just because it isn't the way you guys would go about it.