Valvoline 2 Stroke Outboard Oil is suitable for use in Evinrude, Mercury, Mariner, Suzuki, Volvo and Yamaha engines requiring 25:1, 50:1, 100:1, petrol/oil ratio, including those outboards with oil injection. Valvoline 2 Stroke Outboard is recommended for use in high-speed, high load and high engine temperature conditions, in both pre-mix and injection systems. Recommended fuel/oil ratios from 10:1 to 100:1. See owner's manual for the correct fuel/oil ratio.