15W / 40 year-round engine oil High-performance engine oil based on selected mineral oils of SAE class 15W-40. 15W / 40 year-round engine oil is particularly suitable for vehicles with gasoline and diesel engines, with and without turbocharging. It is used for vehicles without extended maintenance intervals. The modern concept of 15W / 40 year-round engine oil enables a wide range of applications and ensures safe operation under all operating conditions. Approved under a different designation according to:  Mercedes-Benz 229.1  VW 501 01/505 00 Qualitatively equivalent according to EU law according to:  ACEA A3 / B4  API SL  Fiat 9.55535-G2 / D2 Recommended if the following specifications are required:  API CF practical advantages:  ideally suited for turbo engines  reliably prevents sticking, enameling and coking of cylinders, pistons, valves and turbochargers  year-round operation thanks to good viscosity-temperature behavior and high shear stability  lubricating film stable even with hot oil and extreme loads  very low oil consumption  high protection against oxidation through selected base oils and special additives  reliable protection against "black sludge"  perfect functioning of hydraulic valve lifters (hydraulic valve clearance compensation)  miscible and compatible with conventional and synthetic engine oils. However, in order to exploit the full product benefits of 15W / 40 year-round engine oil, a complete oil change is recommended.