Well it took 4 test drives for me to jumped into the hybrid game and love it. The optima has size, weight and best of all looks. Very happy with the 39.4 mpg on the first tank. ( 729 miles and 18.5 gals ) not too bad for 50 / 50 tank of C/H driving, thats 10 morning cold start and 10 late afternoon starts. hope to see more as the car get the miles added on it. Dave.