blackbeagle...I think the product worked EXACTLY as designed... it was designed to lighten your wallet by a predictable amount... being lighter you actually got a bit better MPG.... unfortunatly they did not disclose that the 0.00523 MPG savings required 456,876 miles to pay back the cost of the product...
FTC is working on mandating this disclosure... but it will be in real real real fine print exposed for 0.33 seconds