Thanks Ian, I kind of wondered. If it did actually work then why wouldn't the manufactures implement the system on the cars themselves.
There was another company too called broquet can be found at www.broquet.co.uk, I enquired by e-mail to them and got the following response:-
That's a cracking car!! I would recommend 2 x 8-pellet units to go directly into the fuel tank.
You have a money back if not satisfied guarantee along with an engine damage Warranty.
In fact it can only be of benefit to an engine because fuel combustion is much better and cleaner.
----- Original Message -----
Hi I have an Audi S5, which has a 4.2 litre V8 engine. Can you explain to me which item would be most suitable for the car.
Also what sort of warranty is supplied with this product.