I've always used good maintenance as the primary means of keeping everything running right. Keep the coolant at the right mix, never skimp on oil quality (and I use 5w40 synthetic year long as good insurance, in cold weather block the majority of the grill to keep the heat in (and I still allow some air through just to ensure some necessary cooling).
Even the quality of the fuel will change the heat of the engine.
Even the quality of the fuel will change the heat of the engine.