From fuelly faq:
faq
How do I use a Fuelly forum signature/badge?
A Fuelly forum signature (or badge) is an image that you can use to sign your posts at vehicle discussion forums. The instructions for adding a forum signature will be different for different forums, but here's a general outline:
Go to the forum you participate in and see if they have a "signature" feature that allows images.
If so, find out if the forum uses "BBCode" or "HTML" to include images.
Once you know, go to Fuelly and click on your vehicle.
On the vehicle detail page, click the yellow badge icon under Recent Fuel-Ups. It looks like this:
On the "Fuelly Signature" page, choose the image you want.
Copy either the HTML or BBCode for your image.
Go to your forum and paste the code into the form for updating your signature.
The main thing to keep in mind is that you need to copy a little bit of code from Fuelly and paste it into the right form at your forum.
