It cost £6.80 inc vat from my local (C&D) motor factor. The mighty pug was suffering from a bit of pinking like symptoms and excessive smoke, both of which have now gone. I did put in some Asda purchased Redex injector cleaner after a test drive to help my high mileage fuel system. (228,000miles and counting)
There are a lot of so called mirical products on the market that I wouldn't touch. This one does what it says though.
To use it, I took the top off the air filter, and squirted it in at about 10 second bursts. The engine coughs a bit as it goes through, and you rev it a bit between each go. It takes about 8 ten second bursts to empty the can.
Its on ebay for about £12 delivered.

