As above - how do i do it ? Is there a guide?

I think fuelly data is just an image, so if you log into your fuelly account it will probably tell you somewhere what the URL is for it, and then you can add that to your signature on here using the "image" option.

Try this FAQ entry: http://www.fuelly.com/faq/23/Fuelly-forum-signature-badge

Edited 28 April, 201214 yr by mbames