From all the posts I've read here, it is highly recommended to leave the oil alone until HAL says so...to allow the break in oil to do it's job. A little more patience...from what I've seen, you'll be changing oil between 5500 to 7000 miles. And yes it seems that MPH seem to improve. YOU'RE LAST QUESTION IS INTERESTING..I'D LIKE TO HEAR ANYONE'S INPUT..WhiteRL said: