If you have a relatively old engine 90k-100k that has been neglected when it comes to oil changes, it is prob. worth it. But if you do it, definitely drop the oil pan and clean it well after draining the oil and flush solution. If you cannot/will not drop the oil pan, then do not even bother doing the flush. You would be creating more problems than solving.Bud Lite said:Has anyone ever tried that stuff that you pour into your crankcase with your old oil and run for like 5 minutes then do an oil change? It claims to clean everything out, just wanted to see what everyones experience with this was.