Excellent cold-start behavior ensures optimal lubrication safety during the cold start phase and contributes to high fuel efficiency. CLEANTOP C4 5W-30 is especially recommended for diesel engines with emission aftertreatment systems that meet Euro IV standards. The engine oil maintains the effectiveness of emission control systems over extended service intervals. Extreme loads and high temperatures are reliably handled under all operating conditions. CLEANTOP C4 5W-30 can be used in both diesel and gasoline engines.