I've driven my car over 600 miles now. I plan to travel 200 miles tomorrow to the SC coast and then back in a few days. Any suggestions or things I need to remember while during the break-in period. Temps are over 90's and I plan to use the AC as I have a passenger (I've become so conscious of my mileage that I often just roll down the windows). I have no desire to be a speed demon but the speed limit will be 70 most of the way so I plan to do just that and no more. We won't surpass the weight limit for maximum efficiency even with luggage.