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It discusses the use of a unique test stand consisting of a motor vehicle with a diesel engine adapted to run on different fuels: liquid and gas. It shares research that seeks alternative fuels to power the diesel engine, including diesel and hydrogen, rapeseed oil with n-hexane and hydrogen, rapeseed oil with n-hexane, rapeseed oil and propane-butane gas, and rapeseed oil with n-hexane and propane-butane gas.