Just to add to my prev post I was running 98RON fuel and set the cruise at 70 and did a none stop 226 miles lucky with only 1 small traffic jam, plus remember the USA gallon is less than the UK Gallon so the US readings will be lower. In the Uk the 2008 model gets a revised ECU for better mpg and lower CO2s (244 I think), so i expect this would be better for 2-3 mpg on top of mine which is the 2007 model and a CO2 of 260.