The Opti-2 20044 comes in one gallon bottles and mixes up to 110 gallons per bottle. All other 2 cycle oils mix to just 50 gallons of gas per 1 gallon of oil (50/1). Opti-2 is a specialized two-cycle, single mix ratio lubricant engineered for use in all two-cycle engines, regardless of brand, model, or mix ratio. It is rated ISO-EG-D , the highest rating available in the stringent International Standards Organization global performance ratings system. Opti-2 meets and exceeds all equipment manufacturers rating requirements. This product is formulated utilizing patented Eutectic additive technology that provides exclusive performance results. One gas can cover all two-cycle engines. It is for all two-cycle engines. With Opti-2, it will increase the performance and extend engine life. Opti-2 provides smoke-free operation. Opti-2 delivers all these features while being the most environmentally friendly two-cycle mix oil available. Opti-2s smoke reduction, and gasohol compatibility contribute to cleaner air, while up to 60% less oil is required, which helps conserve a precious non-renewable resource.