If all the wear is on start up, why is it you see the cars that are driven fast and hard smoking? I propose that using the engine causes wear. I propose that a higher wear rate is experienced at start up, but the highest wear is caused by the hard driving. It seems wasteful to me to agonize over something you cannot avoid, starting the engine, when you can do something about the excessively hard and fast driving that really causes the wear. I have yet to see the easily driven car smoking like the hard driven cars do. I have yet to see a car smoking from being started up, unless it was started without oil.