Ive had 46 and 13 all from the 2+ Mistress. Have a guess which was boring as f*ck and which wasn't. Worth a few quid extra in fuel IMHO.
Buy a diesel if you are bothered about such things.
Don't think the point is about saving fuel mate
Think its more about what the great Mk5 Gti is capable of if needed
Again all part of the GTI's all round appeal or as Clarkson said all things to all men
I personally quite often have my 1 year old daughter in back of car with me so that's when the better mpg is quite rewarding on a booring reserved drive
I own/drive a Gti because it's a great car not because I like to hoon it round everywhere! Hence why after 13 years driving ive still got a clean licence and never been involved in any accidents (touch wood)