Given that there are actually a lot of legitimate needs for trucks, Chrysler feels this change would be impractical. The Hill-Terry bill keeps separate standards and also pushes out the time-line. The Hill-Terry bill also has flexibility in what the thresholds would be. This latter difference is what concerns supporters of higher CAFE standards because they feel it will ultimately get watered if it is passed. If Congress would do something to insure a minimum price for oil so that demand for more efficient vehicles would be maintained and enhanced, then all of these arguments over how high to raise the standard would be moot.