HappySqurriel according to the articles I've read the criteria for this program are pretty strict, the car you give up has to do less than 18 miles per gallon (and the new one above some other amount).
According to my calculations in European units that's 13 liters per 100km, which is... terrible mileage compared to today's cars.
My Mario Kart Wii friend code: 2707-1866-0957







