1> Yes, 98% of what I see and what my customers tell me.....you're mpg should go up with engine break-in
2>46 mpg in an 07 civic? That is freakin amazing...most my 02 civic was 40 on the highway....36-38 average....07's are bigger and have a bigger engine...plus they're ugly & very not-very-wind friendly

j/k
Plus...45mpg in an old civic is freakin amazing....how are you coming to this conclusion?
3>Yes, this would explain why now new cars in america have realistic mpg......The government "just" recenlty made this legit....so you will be seein more of these realistic figures...I doubt canada has jumped on the bandwagon yet......
Plus you have to understand....if you had a product wouldn't you want to boast about it and make it look really well? We'll people run car companies.....and people like to make money...and not all people are honest....just how the business goes man.....car business is anything but legit .... I hate to say it! So, this is why you get "stretch" mpg fixures! But....they do get those figures....in a lab,no wind, and no accessory....so techanically.....it's not a lie
