Why do oil companies go through the trouble of designing diesel formulated oils? Did you miss the point of my post (again)? You yourself said that diesel engines are a lot harder on motor oil. Won't a diesel engine destroy conventional motor oil very quickly? How are arguments about diesel oil directly relevant to gas engine oils?
Why do you ignore the bulk of people's posts, and only pick one point to counter-argue? Why do you post multiple replies to the same post? Why do you start calling people names when you are losing arguments?