Shift your weight onto your elbows as you step back with the other foot and place your feet together. Hold until your form starts to fail or until you are no longer able to keep our abs pulled to your back. Step into the ball with one foot at a time. 1  Equipment notes.
For comparison's sake, most modern trucks manage between 5.5 and 6.5 mpg. For most long-haul truck drivers, an increase in fuel economy of 54 percent would equate to a savings of around $25,000 per year at current diesel prices.
As an owner with a 15' GMC six speed it gets better or equal mpg than some of the current trucks with more speeds than six. Now if a 10 speed truck got 30 mpg (gasser not diesel), that would garner my attention otherwise it's a waste in dollars and even more of a hassle regarding repair costs.