Starfire SAE 5W-20 Full Synthetic Motor Oil Bag in a Box 6 Gallons Dexos Gen-2 Approved API Certified. The innovative 5W-20 Eco-Box design reduces environmental impact by reducing discarded plastic packaging by as much as 85% when compared to quart packaging. The flexible bag-in-box design also provides a significant reduction in residual oil that would normally be left in conventional plastic packing, so there is less wasted product! 6 Gallons/case