[driverdude]

For me cruise control is the best option on my mostly flat terrain environment. For drivers not interested in high MPGs their technique, if it can be called that, is to speed up, slow down, change lanes at every opportunity, etc. which destroys any possibility of efficiency. By staying in the right or center lane at 60-62 mph ON CRUISE CONTROL, my vehicles use exactly the amount of fuel needed, no more. The slight rise and falls on my highways near Cincinnati, OH do not affect negatively MPGS. I do get 33-35 mpg (one 2008 hybrid SUV, one 2001 4 cylinder Audi TT, 5 speed). I have attempted to push these cars to higher MPGS but the technology built into is maxed out, unless I go downhill, of course). Higher tire pressures do help. I am looking into other aerodynamic alterations but those seem limited.) Good luck to all.