I don't know exactly what the name of it was, but I'll find out for you. It was a type of cleaner/lubricater fluid that cleans out the chamber and the
components. I paid £7 for it and it just pours into the fuel tank.
I must admit, I drove into work tonight (on nights) and it seemed alot better. Even the initial pull away in 1st gear seemed more instant and responsive. The real test will be tomorrow morning when I drive home at 6.30am !!