Use synthetic oil to break in a motor?
I thought your article was informative. Although you left the decision up to the reader, which I guess is the right thing to do. The subject of "oil" either synthetic or petroleum based is a much talked and argued about topic. I would like to have seen some actual test results done by professional people. Things like breakdown in heat or cold temps, oil life of both types, etc. Either way I have learned more on the subject from the article as printed and I do appreciate that. One other question I have is about breaking in a new or rebuilt engine. I was told Never use synthetic oil to break in a motor, I have searched but not found anything on the subject. Any advice I would appreciate. firstname.lastname@example.org