I just wonder how true the FAQ's section is. They maintain that by using these wonderful new gadgets, you will save enough fuel to recoup the costs. With today's current gas prices I can see that happening, even at a very small amount saved. But I wonder if it would be a perceptible, measurable amount, otherwise how would you know? Sounds a little like The Emperors New Clothes theory. Maybe I'll get them and be our guinea pig.