Default units is US ... causes confusion with non-US signatures

[MMUK]

The default units for Fuelly is US Gallons. This is fine for people coming from the USA, but confusing for people coming from elsewhere.

In the few months that I've had a fuelly account & forum signature, I've been asked 3 times 'why does your signature say 71mpg when your page says 60mpg', and it's starting to get a bit irritating. This happens because people don't realise that they have to set a cookie for the default units.

So could I make the following suggestion:

* If a signature link is followed, and the user has no units cookie, the page be displayed with a warning 'set your units'.

This could be made more intelligent by considering the top level domain or using geotagging (for example, if their ISP domain is .ca, then it should default to metric units, if the ISP domain is .uk then to imperial, etc). Similarly if the ISP top level domain is .com or .net, then the geotagging country could be used to identify the appropriate units.