Those of you with the Detroit 6V-92TA know how absolutely useless the Foretravel installed "block heater" is. Since it's has nothing to do with the engine block and only heats the thermostat housing and crossover pipe, it does not warm the block. To test it's efficiency, I left the Foretravel block heater on overnight in freezing temp at 5000 feet in the Sierras. In...