* Maintenance: Regular, high-quality maintenance is paramount. Following the BMW recommended service schedule, using the correct fluids and filters, and addressing any issues promptly will significantly extend the engine's life.
* Driving style: Aggressive driving, frequent hard acceleration, and high-rpm operation will put more stress on the engine and reduce its lifespan. Gentle driving and regular maintenance are crucial for longevity.
* Operating conditions: Severe conditions like extreme heat or cold, frequent stop-and-go traffic, and dusty environments can accelerate wear and tear.
* Specific engine variant: The G20 platform uses several different engines (e.g., 2.0L 4-cylinder, 3.0L 6-cylinder). Their inherent designs and manufacturing tolerances will impact longevity.
While some G20 owners might report exceeding 200,000 miles with proper care, others might experience problems much sooner due to neglect or harsh conditions. A reasonable expectation, with good maintenance, is likely in the range of 150,000 to 250,000 miles, but this is just an estimate. Beyond that, engine lifespan becomes increasingly variable and dependent on the aforementioned factors.
