Now that we've exhausted every other MPG topic (speed, temperature, rain, snow( :)), wind, altitude, break-in, tire pressure, tread depth, aero mods, P&G, acceleration & breaking techniques ad nauseum, best route, EV+, weight, gas, oil, look ahead / plan ahead, drafting, hand position on steering wheel, aliens, etc,), maybe its time to consider bumpy roads! Ever try to bounce your car up and down to check shocks? Not very easy. Now think of that happening non-stop as you drive - the energy has to come from somewhere. Agree? I wonder if it could be significant in that rarefied 60+ MPG world some of you enjoy. Does anyone have parallel smooth/bumpy roads to compare? Maybe an old road along an Interstate? (P.S. SnowStorm hopes for more buy-in on this topic than Can Hills Save Gas?! Still say they can!)