NISOTEC SUPER LONG SAE 15W-40, SAE 20W-50 are high quality mineral engine oils formulated using quality base oils, together with a carefully balanced additive system to provide a high level of engine protection. They are recommended for the lubrication of diesel engines installed in commercial vehicles, buses, mining, construction and agricultural machinery, which work in normal and heavy working conditions. Gradation SAE 20W-50 is recommended for engines with a higher number of working hours/miles traveled and with increased oil consumption.