Rather than many of the other questions regarding this, as well as Seafoam, this question is not about a comparison... I want to know, what exactly would happen to an engine if this stuff were poured into the crankcase and left in for too long? As an engine flush, it says something like "idle for 10/15 minutes and drain oil" - so what if someone poured the whole can in and drove around, not draining the oil - what would/could happen?