Opti-2 is a specialized two-cycle, single mix ratio lubricant engineered for use in all two-cycle engines (including boats, chainsaws, leaf blowers and string trimmers) regardless of brand, model, or mix ratio. Opti-2 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.