Welcome brother across the pond! These folks in this forum are very smart and helpful. I was looking into a diesel Punto while living in Melbourne Australia back in 2006. That is a really nice car. We are to get the Fiat 500 with a petrol engine either the end of this year or the beginning of next year. I would recommend adjusting the nut behind the steering wheel for the biggest fuel efficiency gains. I don't know how much the aero mods will help if you do a lot of city driving. Speeds were low when I was in the towns outside London England. Wild guess has you doing more low speed driving. I practice pulse and glide in our hilly part of my state. I have not mastered my recent car but noticed that my rolling resistance dropped when I switched the old all season tires over to new snow tires. I will not be putting those old tires back on. I might go with a grille block and a partial belly pan to cover my 45 mph and higher driving situations. Not a big issue at the moment.
Welcome,
Neal
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