Yeah, I have heard that. I just don't know if it's for me. I would rather just run a bunch of cheap oil through the motor and see where I end up rather than go that route. I feel the same way about Seafoam in the oil too. In the gas tank or in the intake manifold seems better, and I have used BG44K with some success, but even that makes me nervous. It just seems like it might solve one issue, but could cause another one.