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Two-stroke engines are used in several purposes, such as lawn mowers, chainsaws, power generators and for motorcycles in some dirt tracks competitions. In addition, small Wankel engines are used in snowmobiles, motorized paragliders and range extenders. Both types of engines are known for the great power produced per displacement, ideal for the purposes aforementioned, but its bigger emissions due to lubricating oil mixed with fossil fuels, such as gasoline, do not pass legislation's standards, which limits their use. In order to reduce emissions, tests with ethanol and castor oil, eco-friendly fuel and lubricant, respectively, will be presented to adequate these organic compounds to the engine's operation.