Is it necessary to use 98 octane gasoline for the BMW 3 Series?

[EleanorLynn]

The BMW 3 Series model is recommended to use 95 octane or higher premium unleaded gasoline when refueling. If 92 octane standard gasoline is used, the power output will decrease. In such cases, it is advisable to drive at medium RPM with lower engine load. Premium gasoline should be refueled as soon as possible. Relevant information about engine oil is as follows: 1. Introduction: Engine oil, also known as engine lubricant (English name: Engine-oil), with a density of approximately 0.91×10³ (kg/m³), serves to lubricate and reduce friction in the engine, assist in cooling, provide sealing against leaks, prevent rust and corrosion, and act as a shock absorber. It is often referred to as the 'blood' of a car. 2. Composition: Engine oil consists of two main components: base oil and additives. The base oil is the primary constituent of lubricating oil, determining its fundamental properties, while additives compensate for and improve any deficiencies in the base oil's performance, imparting new characteristics. Additives are an essential part of lubricating oil.