Hey I just bought my first new car and got the '08 Civic LX coupe 5 Spd. I love it but I've been reading some of the post about gas mileage during the engines break in period (first 600 miles). I've driven about 120 miles my gas tank is about at 2/3 of a tank. Granted I've been doing a lot of city driving, can I expect to get sub-par gas mileage until the engine is broken in?