Mag 1 61658 All Fleet 15W-40 Engine Oil - 1 Quart Bottle (Case of 12) The product is Mag1 QT 15W40 Dies Oil Easy to use The product is manufactured in China Wear protection significantly exceeding API CJ-4 and the toughest OEM specifications High detergency and superior dispersancy keeps engines and pistons clean and soot suspended in the oil despite longer drain intervals and increased soot loading Higher starting TBN (10.0) provides added oxidation control and protection against acid build-up that can cause rust and corrosion Excellent TBN retention Excellent oxidation control and piston cleanliness