The one you should paste here will looks something like this (I removed some square parentheses so you can see the text).
URL=http://www.fuelly.com/driver/cobie56/focus IMG http://mefi.us/images/fuelly/sig-us/XXXXX.png
Instructions on how to find it (lifted from another forum):
1) Go to your dashboard at fuelly.
2) Click on your vehicle -- this will take you to your vehicle page (in my case /driver/<yourcarname>/focus)
3) In the lower right, there's text that says, "Share your MPG" with a link to "view all badges and stuff you can share". Click that.
4) There is code there that says, "copy and paste the following BBCode" (you can see big and small).
Posting here because cobie56 has set his profile not to allow PMs:
The reason that you can't get the fuelly in your signature is because those permissions are configured by the site not to allow images or urls in your signature.
You can only include those in the body of a message itself (which is why everyone has only made a post with their bb link in it).
Originally Posted by cobie56
btw,i tried to use the FB icon fuelly provides but it won't let me post to ff