Oil consumption typically, means a seal of some sort-valve guide, oil pan gasket, head gasket, front or rear main, or piston ring. Research on single tanking with a barely heated system, especially in colder climes may lead you to a conclusion many have already come to regarding the lovecraft conversion.

So, as one who does not as some seem to, sanctify the 61X, I still encourage you to take this negative result and feed it into decisions you make about use and modification of engines that follow it in your life. Other comments which follow may seem less measured or polite.