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Originally Posted by mgescuro
I mean if the engine will heat the fluid, what's the point of heating the windshield washer fluid separately, like on Lucern, DTS, and a number of Lexus?
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The heat of the engine is only enough to keep the fluid from freezing. The heating system you find in the luxury cars makes the fluid hot enough that it'll melt ice on the windshield itself. Huge difference.