[Sportstick]

Let's put aside efficiency, emissions, and performance just for the sake of the argument. Does anyone disagree that, purely from the point of view of engine wear and tear, a gradual warm up is the best approach, for example, 20-30 seconds of standstill after cold start, and then nothing over ~2500 rpm for first 5-10 minutes (as we are not blessed with a temperature gauge)? My experience is that most physical matter doesn't like to change states quickly (cold to hot, for example).