First tank is in!
I got 468.3 miles to 12.94 UK mpg giving 36.2 UK mpg
This was despite the fuel filler neck leaked out about a gallon due to a bust hoese clip..
it equates to 15.5 US gal and 30.2 US mpg.
the EPA figures have been entered using the 2008 versions off the govt website.
Published UK combined is 31.7UkMPG, so I'm about 14% ahead