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The BMW e46 330i recommends using 5w-30 type oil. It is important to change your oil periodically, typically every 5,000 to 10,000 miles. Neglecting to do so can lead to engine issues. Using high-quality oil is vital for optimal engine performance. If ignored, you might detect a strong burning smell, signaling a serious problem that requires immediate attention to prevent potential engine failure. Outdated or poor-quality oil can also result in engine malfunctions, such as strange knocking sounds and decreased fuel efficiency.
For a BMW 330i e46, it is suggested to use 5w-30 fully synthetic high-performance motor oil.
Motor oils designed for BMW e46 330.