Yes it is perfectly acceptable to drive this way. FYI, "Low" is NOT a gear in a Volt. It only effects braking, it ramps up the regen when you lift off the accelerator. Also, Sport Mode only remaps the accelerator so that it reacts quicker. You can get the same effect by pushing the go pedal farther in Normal Mode.Any of the very knowledgeable engineers \ Volt owners with drivetrain knowledge know if its OK to drive on Low + Sport when running on gas?