To reach optimum fuel consumption figures, prob best not to calculate until our i20's have covered 2,000 miles+. Otherwise, engines still tight, won't produce best fuel consumption figures.
I don't expect to achieve Hyundai's stated fuel consumption figures. If I acheived 50mpg mixed driving, I'd be very happy.
I'm not going to worry too much, until car has covered 2,000 miles. 1,500 miles to go :-)
If you've got a spare 10 mins, this website worth looking at, if your interested in general fuel consumption figures & how calculations are made between manufacturers:-
http://www.vcacarfueldata.org.uk/informati...ting-scheme.asp