I'm new to this type of forum, so can you older hands tell me how you get the "Fuelly" thing at the bottom of your posts. Not that I've got a PHEV yet to tell you what my "Fuelly" is!
Register with this site to monitor MPG of any of your vehicles and you can import your on-going MPG signature to any other forum. http://www.fuelly.com/
Just make sure that you change the units on your 'badge' to Imperial mpg not US mpg. It's not sufficient just to set the right units on your dashboard.