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In 2007, the recommended oil type for the BMW 525xi is 5W-30. Changing your oil is important and should be done every 5,000 to 10,000 miles. Failing to do so can lead to engine problems, which is why using high-quality oil is crucial for maintaining a smooth engine operation. Neglecting oil changes can result in issues such as a burning smell, signaling a need for prompt attention before potential engine damage occurs. Poor-quality oil can cause engine failure, decreased gas mileage, and engine knocking noises.
For optimal performance, a 2007 BMW 525xi should be fueled with synthetic 5W-30 engine oil.