Certified NMMA. TC-W3 Low smoke. Itasca Marine Universal 2-Cycle Engine Oil is formulated from virgin base stocks, along with ashless additives, to provide outstanding protection against piston scuffing, bearing wear, ring sticking and rust. It is certified by the National Marine Manufacture’s Association (NMMA) as an approved TC-W3 lubricant. 16:1: Gallons of Gasoline/Ounces of Oil to be Added: 1/8, 2/16, 3/24, 4/32, 5/40, 6/48. 32:1 Gallons of Gasoline/Ounces of Oil to be Added: 1/4, 2/8, 3/12, 4/16, 5/20, 6/24. 50:1: Gallons of Gasoline/Ounces of Oil to be Added: 1/3, 2/5, 3/8, 4/11, 5/13, 6/16. 100:1: Gallons of Gasoline/Ounces of Oil to be Added: 1/2, 2/3, 3/4, 4/6, 5/7, 6/8. Made in USA.