Noticing that your engine is burning oil can be concerning, but catching the signs early can help you address the problem before it worsens. When an engine burns engine oil, it’s typically due to worn components that allow oil to slip into the combustion chamber, where it’s burned alongside fuel. Knowing the signs of oil burning and how to address it helps you protect your engine and extend its life. Here’s what to look for and steps you can take if you suspect your engine is burning engine oil.

Signs Your Engine Is Burning Engine Oil

1. Blue Exhaust Smoke: One of the most common indicators of oil burning is blue-tinted smoke coming from your exhaust. This smoke appears when oil leaks into the combustion chamber and burns along with gasoline. If you see blue smoke, especially during startup or acceleration, it’s a clear sign that oil is burning.
2. Frequent Low Oil Levels: If you’re frequently topping off your oil or notice it’s dropping faster than usual, your engine may be burning the engine oil. Regularly checking your oil level with the dipstick can help you catch this early. An engine that loses oil quickly without visible leaks is likely burning it internally.
3. Oil Smell Inside the Vehicle: Burning oil often produces a distinctive odor, which you may notice inside the car. This happens when oil burns in the engine or leaks onto hot engine parts. If you smell burning oil regularly, it’s time to investigate further.
4. Reduced Engine Performance: It can affect engine performance, leading to rough idling, slower acceleration, and decreased fuel efficiency. Excess oil in the combustion chamber can impact how the engine burns fuel, which may cause your car to feel sluggish.

What to Do

1. Check for Leaks: Even if you don’t see obvious oil puddles, inspect the engine for any seepage around seals and gaskets. Sometimes, worn valve seals or piston rings allow oil to slip into the combustion chamber. Replacing these parts can often fix the issue, especially if it’s caught early.
2. Use High-Quality, High-Mileage Oil: If your engine is older or has high mileage, switching to high-mileage oil can help reduce oil burn. High-mileage oils contain conditioners that swell seals and reduce leaks. Consider a quality synthetic oil like AMSOIL, which resists breakdown and maintains its protective properties even under high heat, making it ideal for engines that are prone to burning the engine oil.
3. Schedule a Compression Test: If you’re unsure about the source of the problem, a mechanic can perform a compression test to check for worn piston rings or cylinder wall damage. This test helps pinpoint the root cause of burning engine oil, allowing you to make an informed repair decision.
4. Consider Engine Repairs: If the problem persists, repairs like replacing worn valve seals or rings may be necessary. Though this can be costly, addressing the issue can prevent more extensive damage and prolong engine life.

By recognizing the signs and taking action, you can manage oil burning and protect your engine from further damage. Whether through routine checks, high-quality oil, or professional repairs, you can keep your engine running smoothly and efficiently.