The beautiful, grey and green one-year old locomotives are powered by engines with catalytic convertors which meet all of the strict Stage III.b. emission regulations. The fuel consumed is one half of the fuel consumed by the previously locomotives. One proof that these new locomotives are environment-friendly is the reduced CO2 production. Another proof is the fact that the previously locomotives used 400 litres of oil, while the new ones are good with just 73 litres.