ROWE HIGHTEC DIESEL SYSTEM PROTECT Fuel additive. Excellent cleaning action inside the entire fuel system. Cleans combustions chambers and injection nozzles. Lubricates and maintains injection pumps. The cetane rating is also increased, thereby ensuring a perfect engine running performance. Saves fuel, increases performance and is ecofriendly. Fuel additive. Excellent cleaning action inside the entire fuel system. Cleans combustions chambers and injection nozzles. Lubricates and maintains injection pumps. The cetane rating is also increased, thereby ensuring a perfect engine running performance. Saves fuel, increases performance and is ecofriendly.