My engine burns 1 qt per 800 miles. I'm not presently concerned with this consumption. I'd like to know if I should be running a dino or syn oil for less junk around the rings and combustion chambers. I also skimmed through the "which oil for cleaning up a motor" thread and was shocked that noone said running a deisel oil would be bad for a oil consuming motor. I thought that the high ash content is a big no no for oil burning motors.