Add Fuel Additive to your 2008-2010 Ford 6.4L Powerstroke every time you fuel up. Most additives are specially formulated to reduce smoke, improve engine performance, as well as clean fuel and engine components. In addition to lubricity and cetane enhancers, some additives are designed specifically for cold weather to protect fuel and reduce fuel gelling. Put the additives you need in your vehicle from brands like XDP, FPPF, Hot Shot's Secret, Stanadyne, and more!