What kind of engine oil should be used for a BMW 4.8?
1 Answers
For a BMW 4.8, both Castrol and Mobil engine oils are suitable, with Mobil being relatively more expensive. Selection of engine oil: When selecting engine oil, the primary consideration should be the viscosity index. Speed (based on general driving conditions), engine load level, and temperature (based on the driving environment) are the three main factors in choosing viscosity. The higher the speed, the lower the viscosity of the oil should be. The higher the load, the higher the viscosity of the oil should be. The higher the temperature, the higher the viscosity of the oil should be. Quality of engine oil depends on: Base oil and additives. The quality of the base oil depends on: the source of crude oil and refining technology, as well as synthetic process technology. Additives mainly include: anti-wear agents - to reduce friction and wear, detergents - to prevent surface deposits, dispersants - to keep insoluble matter suspended, antioxidants - to inhibit oxidative decomposition, corrosion inhibitors - to prevent rusting of metal parts, friction modifiers - to improve friction performance, demulsifiers - to separate oil and water, pour point depressants - to improve low-temperature fluidity, anti-foaming agents - to reduce foam (air in oil) formation, viscosity index improvers - to enhance viscosity-temperature characteristics, and EP additives - to control wear under extreme load conditions.
