Using Hot Shot's Secret Diesel Winter Rescue is easy. If your truck has liquid fuel in the tank but won't start, mix equal parts of Winter Rescue and diesel fuel in the fuel filter. Wait a bit for the de - icer to do its job, then let the truck warm up. If your fuel has gelled, add the whole 32 - ounce bottle to every 40 gallons of fuel in the tank and also use the 50/50 mix in the fuel filter. Just wait a few minutes before starting the engine. There aren't any special maintenance steps for this product. It's safe for all engines, so you don't have to worry about compatibility. Remember to store it in a cool, dry place when not in use.