Red Line's full synthetic two-stroke oils are ester-based. This provides the best protection and cleanliness. The protection consists of an oil film which has very high adhesion and oil film strength. Red Line's two-stroke oils provide the same lubricant quality as castor oil but with much better purity at piston rings, ports, spark plugs and power valves. The low ash content of the oil reduces the risk of contaminated spark plugs and smoke generation.