Is It Normal to Have Engine Oil in the Exhaust Pipe?

1 Answers
CoreyFitz
07/30/25 6:04am
Having engine oil in the exhaust pipe is not normal. The leakage of engine oil from the exhaust pipe is due to high crankshaft pressure. The causes and solutions for engine oil leakage from the exhaust pipe are as follows: 1. Cause: If engine oil drips from the exhaust pipe, it is generally due to cylinder blow-by or a blocked crankcase breather. Solution: Conduct a corresponding inspection and then replace the faulty part. 2. Cause: Check if the PVC one-way valve is blocked. Open the oil filler cap, start the engine, and check if the exhaust gas emitted from the oil filler cap is excessive. If it is, it might be due to piston ring blow-by, causing engine oil to spray from the exhaust pipe. Solution: Replace the piston rings. 3. Choose the right engine oil: Always select high-quality engine oil when maintaining your car. Good engine oil, especially fully synthetic oil, can protect the engine, reduce the frequency of oil changes, and save on fuel expenses.
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