I personaly believe running wvo destroys these engines over a long period of time, maybe 50k. Its probably extremely bad to start a cold (even if its 90 out) engine on wvo as it probably doesnt burn completely and gunk sticks around. Ive worked on a few wvo cars, all of which had the worse blowby ive ever seen and with less than 300k on them. Thursday morning I changed the oil on a veggie car (5k change intervals) and his delo 15-40 smelt like food and had a viscocity not far from water. The car has so much blow by he had to have an extra oil seperator installed in the engine bay (one which he has to empty monthly) becuase the normal one became overloaded

__________________
1981 300SD 512k OM603