Engine flush... Yes or No???

Contrary to what you might think, there is nothing that will break up jellified THICK sludge in the bottom of the oil pan short of a putty knife. Nothing. If you think that, then you've never seen what I'm talking about. Stop giving people bad advice, because it simply will not work on really heavy sludge layered in the bottom of the oil pan. What it may possibly do is break up enough of it so that it gets sucked into the pickup and stops up what little oil supply there is. Additives are NOT made for heavy sludge in the bottom of the oil pan. The only way to remove it is to get the pan off and physically clean it out. Anything else is a complete waste of time and money.