Hybrids actually don't get very good gas milleage for 2 reasons. 1) The batteries die quicker because you're also hauling an internal compustion engine around (plus fuel and accessories to make it work. 2) Once the batteries die (or you reach a certain speed), the internal combustion engine is less efficent than a normal car because it's also hauling an electric motor and batteries around.
People think a hybrid gives you the best of both worlds, but it actually gives you the worst of both worlds.
Just go with the flow control, roll with the crunches, and, when you get a prompt, type like hell.