Has anyone had any experience with this stuff?

 

It's not your usual fuel additive. I used it on my Golf PD130 and it made a noticeable difference to MPG and the engine did sound quieter, I've just purchased some more to use on the Vrs. I've heard of rumours saying it corrodes fuel lines or doesn't work but as it's not an additive it doesn't get diluted into the fuel. You add it directly after the fuel filter as shown in the video below (not a pumpe duse engine but you get the idea).

 

Tried it on my golf - didn't do any harm. 

 

I fancy giving it another go...only this time I'll get the right size tubing/attachments cause it got a bit messy last time...lol. Give us a link if you order any tubing/attachments and if they fit well.

 

Bare in mind I had to link the outgoing on the fuel filter back round to the return line or something like that - nobody else mentioned it yet my fuel filter decided to squirt everytime the pump primed...can't see how i could have done it wrong :P

I remember now...I joined the fuel in to the fuel out so the filter didn't have any pipes going into it - otherwise it would "splurt" a good amount of fuel out as it primed. Guessing the fabia will be the same