I know Ford has been working on replacing racker arms/camshafts with electronic servos that would open the valves....

To me that would be great...the after,arket could go wild with cam programming and the oem's could really bump up mileage

BTW, For years my dad ran the F150 (and F100) with the 300 cid & 3sp/5sp od trans. City mileage was always 15-18 even with a load, low 20's hwy and he tracked on 3 separate occaisions, when towing (3,000 lbs), hwy mileage was consistantly 27-28 mpg!

IMHO, like everyone else, 25-30 mpg is possible with todays tech!