I very much appreciate the feed back so far. I do have 3 valves per cylinder. I don't take off fast I watch the vacuum gage and try to keep it in the green as best I can. I changed to pressing the OD button as soon as I start the engine which keep every gear in a lower range, keeping engine RPMs higher and vacuum gage in green thru all gears. Even in flat Florida if I don't take it out of OD (by not pressing OD button) it will change between 4th & 5th gears at any slight incline. I'll try all the suggestions received so far. I'll look into the tuner devices. I can't believe that an intake and exhaust package wouldn't help mpg more than they advertise.