I think the oil debate is right under Religion and Politics! I have seen verbal throw downs on other sites about what oil to use and when to change. This is how I see it on two of the topics in this thread; Cars that run a long time with never changing the oil depend on a few factors, the way they are driven and the quality and care of their build. I had about 13 cars between age 16 and 25, the one that stands out was a Pontiac 6000le with a 2.8 multiport. I beat the living hell out of that car daily racing my friends who all had Audis and VW’s. I sold that car with 220Kmiles on it! I did change the oil every three K but here is the part about the care taken when it was built, All of the other American made cars I had which I took better care of and changed the oil every 3k did not last near as long. My other thought on this idea of no oil changes is this, Oil is the blood of the car and gas is the food! What happens when your blood is toxic? Same idea for a car! Also I think we can consider the engine in the 560 a high performance engine for those year ranges. In a high performance engine the conditions are very demanding! At the end of the day it is all opinion. My 87 560sel gets Mobil 1 10w-40 high mileage oil in the summer and Shell Rotella T6 5w40 in the winter. Now to start a real fight on this topic,,,, I also use the Shell Rotella T6 in my motorcycle!!!!!! I can see the pitchforks and torches coming already!