This project was intented to evaluate and obtain performance, emissions and internal cylinder pressure data of a cycle Diesel engine with additions of biodiesel, obtained from cooking waste oil, in the original fuels. The experimental results of performance and emissions of a Diesel engine (Turbocharged with intercooler), obtained from a dynamometer bench, are presented. Then the experimental data was analyzed and compared with respect to performance and emissions of the original fuel operations and the biodiesel operation ways. The results shown a reduction on the nitrogen oxides and particulate emissions, on the other hand was observed an increase on the carbon monoxide emissions. The performance was impacted as the percentage of the biodiesel increase, mainly on low rotation regime. Thus, this project enlarges the knowledge of some aspects on the operation of cycle Diesel engines with addition of biodiesel.