Quick Question

[AndrewBird]

Hot climates are the only time it would be useful/needed. Pretty much everywhere though is fine with the stock temp. Hotter temp is good for cold areas.

[Erik]

your thermostat is stuck open. Does it ever creep past the middle at all while you're sitting in traffic? Is your heat lukewarm?

Yeah this. If you're heat isn't working well either that should definitely be it.

[nando]

Hot climates are the only time it would be useful/needed. Pretty much everywhere though is fine with the stock temp. Hotter temp is good for cold areas.

I disagree.

a cold t-stat isn't going to do any good if you're in a hot climate and your radiator is too small/inefficient. *all* it does is open sooner, it can't and won't make your car run cooler than a hotter one would assuming the radiator can handle the delta-T. If your radiator can't handle the delta-T then you're going to overheat anyway.