Many BMW models require premium gasoline, characterized by its higher octane rating. The manufacturer often recommends this fuel type to ensure optimal engine performance and longevity. Using gasoline with a lower octane rating than specified could, in some cases, lead to decreased power output and potential engine knocking or pinging.
The use of premium fuel is often tied to engine design, specifically those that are high-performance or turbocharged. Premium gasoline helps prevent premature detonation, a phenomenon that can damage the engine. The historical context involves advancements in engine technology, where higher compression ratios and turbocharging became more common, necessitating fuels with enhanced anti-knock properties.
