THE ONLY 100% GUARANTEED OIL THAT REDUCES ALMOST 0 SMOKE TO exhaust bel-ray SI-7 Full Synthetic for 2T engines represents the newly developed separate lubrication oil, developed specifically for injection/self-lubricating systems. Its clean, completely synthetic combustion formula eliminates fumes and does not form candle fouling. It has exceptionally clean combustion and substantially reduces the formation of residues. Exceptional wear properties, a durable film protects engine components and reduces friction to maximum power Application: 2-time motors with da injection/self-lubricating system ad oil, or mixed up to 50:1 It can be mixed with mineral or synthetic oils