I'm sure no single person understands every detail of the diesel engine, arguably nobody so far can solve the Navier-Strokes equation exactly. But even children understand that the car needs fuel and they might now that it has an engine that can break if given the wrong fuel. They could, at least. The fact that there are those who don't only corroborated the fact that there are folks who don't know how ... what was the actual problem? Will be owned by having their traffic captured.