I guess I'm a born skeptic, if these things were so good I am sure a car manufacturer somewhere in the world would be using them or equivalent on their engines? I would think you will have to do some high mileage to breakeven on the cost of the unit. It's like all the additives and gizmos on the market to improve this or that most of the placebo effect is with the user. Hope it works for you which I'm sure it will.
