Been a proud owner of Honda certified 10 Insight EX Navi for the past 2 weeks . Coming from a 96 Rav4, I can't be happier to have this baby. However the mileage is a bit of a concern for me. The 100 miles that I been driving, its on econ on all the time. Occasionally have the A/C on. Avg. speed of 65 - 70 mph. My average MPG is only 40. Is this normal for driving in LA? I do carry equipment that is about 100 - 120 lbs. Could the battery been depleted? Do I need to bring it back to the dealership for the software upgrade?