Hi Richard,
I can't remember if the list below has change since the forum rules were amended on signatures, but there still appears to be a few stumbling blocks to adding a fuel icon to signatures.
The following errors occurred when trying to save your profile:
The following BBC is not allowed within your signature: abbr, acronym, anchor, black, blue, br, code, center, email, ftp, font, flash, green, glow, hr, html, img, iurl, li, list, left, ltr, me, move, nobbc, pre, php, quote, right, red, rtl, s, size, sub, sup, shadow, time, tt, table, tr, td, url, white, thumb.
I've had a look at the Simple Machines documentation (
http://wiki.simplemachines.org/smf/SMF2.0:Features_and_Options#Signatures ) and it appears that some unticking of boxes and alterations of values might need to be done.
Maxium allowed characters: A spritmonitor icon will gobble up 113 characters, with a few more for the description, so depending on cars in the house, metric/imperial perhaps it may need nudging up at a later date from 300 chars max.
Maximum amount of lines: Don't know how many it is at the moment, but 5 should do.
Maximum font size allowed in signatures: 12 pixels?
Allow smileys in signatures: No?
Maximum smiley count: If allowed, then 1.
Maximum image count: 4 for starters as 1 car's fuel icons could have two small images (Imperial/metric)
Maximum width of signature images (pixels): 500 (I think a large Fuelly banner is this wide)
Maximum height of signature images (pixels): 100
Enabled BBC tags: Yes, and allow
html,
img and
url as highlighted above.
And anyone who particularly hates signatures can always turn off viewing them in their profile settings.
Hope this helps.