just another Hoax or is there something to this?

[mpg_maniac]

http://www.befreetech.com/save_gas.htm

Dynamometer tests on 318 Chrysler engine have indicated 9 times mileage from our future "Pre-Ignition Catalytic Converter"!

To shock you even further - imagine using water with the PICC in a 50/50 ratio to potentially increase that mileage to 18 times yours. If you're filling your tank weekly, then once a PICC is installed in your car you may need only to fill your tank three times a year!

Also with a PICC, changing your oil due to carbon contamination will be days gone by. For this and other reasons, such as a cooler burn, your engine is likely to last much longer.

18x???