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In an American context, the 2001 Chevy Blazer recommends using 5W-30 oil for optimal engine performance. It's crucial to use high-quality oil to keep the engine running smoothly. Over time, issues can arise with the oil, such as a strong burning smell, which should be addressed promptly to prevent any potential hazards like an engine combustion. Poor-quality oil can lead to engine failure, indicated by abnormal knocking sounds and reduced gas mileage. It's important to change the oil every 5,000 to 10,000 miles to prevent engine problems.
The ideal oil for the 4.3 Vortec engine is a semi-synthetic 5W30 blend.
The recommended oil for the 2001 Chevrolet Blazer is 5w-30.