Ok. I don't want to get in to deliberations on this. this is some general info !!!, I worked at a main Vauxhall dealer ship for a few years not as a technician just a lackey !!!, I'm still in touch with a long severing technician 26 years service, I still get mates rates and collected some sill protectors yesterday £38.99 bargain. the question I asked while I was there. will my Corsa 1.4 T LE use more fuel than normal because its new, the answer was definitely yes. the engine will need to do a few thousand miles to settle down before you get a true MPG. its not the case of running in at 30mph for 500 miles just sensible driving. on another note, I owed a brand new 11 plate VXR Corsa for 2 years, I prefer 1.4T LT hands down. its far better equipped and Vauxhall have done a great job from the previous Corsa.