Once referred to as "Super Blendzall" because this premium blend racing castor offers high performance and ultimate lubricating protection all in one bottle. ULTRA can be used as either two-stroke premix, or oil injector oil. ULTRA has the latest in anti-friction and extreme pressure (EP) additives that allow maximum horsepower while practically eliminating engine wear. * The ultimate all weather 2-stroke castor racing oil * Ideal for motorcycles, ATVs, snowmobiles, watercraft and karts For 2-Stroke Premix: 16:1 = mix 8oz. per gallon 20:1 = mix 6.4oz. per gallon 32:1 = mix 4oz. per gallon 40:1 = mix 3.2oz. per gallon 50:1 = mix 2.6oz. per gallon 60:1 = mix 2.1oz. per gallon For 2-Stroke Injection:  When using as an oil injector oil, be sure to drain and clean your existing oil tank and oil lines. Mixing with petroleum or synthetic oils could cause mechanical problems.