So then no one has tried it. I doubt I will either; I thought the same thing as you but thought it was interesting enough to bounce off someone else. I did a grill block last year and that helped; I couldn't even keep the engine fully warmed up without it. This year I will do a better block as well as a hot air intake. I am still leaning towards a block heater because I doubt it takes as long to warm up the Insight's 1.0 L engine, 2.6 quarts of oil, etc. as a more teaditional auto. Even if it is energy neutral I will get a warmed car with less wear on internal parts, as well as fewer stops at the gas station. Plus I won't be freezing by butt off.
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