“Volvo Penta recommends its customers to operate Volvo Penta’s diesel engines only on diesel fuel that conforms to EU standard EN590. Volvo Penta’s diesel engines can be operated on diesel fuel with a higher blend of biodiesel than 5 %- in other words, a higher proportion than stipulated in the EU standard EN590. If such a fuel is used, the engine’s emission levels may increase slightly. The engine will also need more frequent service intervals to avoid excessive wear and shorter lifetime. Volvo Penta’s guarantees do not cover damage caused by too high blend of biodiesel.