Ensure your truck is Ready for the Road Ahead with enhanced engine stability, with the Penray Winter Pow-R Plus Diesel Fuel Treatment. To keep your engine running smoothly during the winter months, this 32-ounce bottle of fuel treatment prevents fuel gelling, wax formation, and cold filter plugging. After a quick run through the system it can improve lubrication and prevent corrosion. FleetPride is your First Click in Heavy Duty .