the ecodiesel is picky on throttle it seems. if i realy care about my mileage i can go down the highway at 70+ and still get 27+mpg. but it takes practice. with cruise i get 22-24. if i had to remote start to warm up (colorado) looking closer to 21mpg with cruise.
my method for best mpg: get...
you say you can no longer modify, i say they made it difficult to modify. the market can solve this better than the government. government would pull a fast one and make it illegal to modify and fine you for changing tire size. see DCMA
while I agree that it is frustrating, I couldn't disagree more with your solution. why are people so quick to ask for more government? its a car that's available for purchase not mandatory. you can just not buy it, or you can buy it and modify it as you wish.