Penray's Winter Pow-R Plus Diesel Fuel Treatment is ULSD compliant, preventing gelling of diesel fuel and ice crystal formation. This treatment reduces cold filter plug point B as much as 30 degrees F, and helps enhance cetane and improve fuel economy. Utilizing HAFI technology, Winter Pow-R Plus Diesel Fuel Treatment improves cold weather starting, stabilizes and prevents corrosion, helps reduce emissions and helps improve lubricity.