If you’ve noticed your car using more oil than usual or seen blue smoke coming from the exhaust, how to fix oil burning ,your engine might be burning oil. Don’t panic — it’s one of the most common problems drivers face in the U.S., especially in older vehicles or those with high mileage.
Here’s everything you need to know about why cars burn oil, how to fix oil burning, how to fix it, and when to call a mechanic.
What Does “Burning Oil” Mean?
When an engine “burns oil,” it means motor oil is getting into the combustion chamber and burning along with the fuel.
Normally, oil is supposed to stay below the pistons to lubricate the moving parts. But when seals or rings wear out, how to fix oil burning,oil leaks into areas it shouldn’t — creating blue or gray smoke and lowering your oil level.
Common Signs of Oil Burning
If your car is burning oil, you’ll usually notice:
- Blue or gray exhaust smoke (especially when accelerating)
- Frequent low oil levels even without visible leaks
- Poor engine performance or rough idling
- Oil warning light flickering on your dashboard
- Burning smell after driving or stopping at lights ,how to fix oil burning
Step-by-Step: How to Fix Oil Burning
- Check for External Oil Leaks
Before assuming it’s burning oil, inspect under your car and around the engine bay for oil drips or wet spots.
Look near:
- The valve cover gasket
- The oil filter
- The oil pan
- The rear main seal
If you find oil on the ground or around these parts, the problem is likely a leak,how to fix oil burning, not internal burning. Replace the gasket or tighten the bolts.
Replace the PCV Valve (Cheap First Fix)
A clogged Positive Crankcase Ventilation (PCV) valve can cause oil to get sucked into the intake manifold.
- Fix:
- Locate the PCV valve (usually on the valve cover)
- Pull it out and shake it — if it rattles, it’s fine; if not, replace it
- A new one costs $10–$25 and takes about 10 minutes to install
- This simple step solves many mild oil burning issues!
Check Piston Rings and Valve Seals
If replacing the PCV valve doesn’t help, the issue might be internal — worn piston rings or valve seals.
These allow oil to seep into the combustion chamber.
Fix options:
- Try a high-mileage oil or oil additive (like Lucas or STP) — they thicken oil and help seals swell slightly
- For severe wear, you may need professional engine repair or rebuild, how to fix oil burning,which can cost $800–$2500
4. Use the Right Engine Oil
Using the wrong oil viscosity can increase oil consumption.how to fix oil burning.
If you’re using 5W-20 in an older car, switch to a slightly thicker oil like 5W-30 or 10W-30 (check your owner’s manual first).
High-mileage motor oils include seal conditioners that reduce leaks and burning.
5. Clean the Engine Internals
Over time, carbon buildup around the piston rings can cause oil burning. You can fix this by:
- Adding an engine flush additive before your next oil change
- Running premium fuel occasionally to reduce carbon deposits
- Using fuel system cleaners like Seafoam or Techron
This helps restore compression and minimize oil loss.
When to See a Mechanic
If you’ve tried the above fixes and your car still burns oil,how to fix oil burning, schedule a professional inspection.
Your mechanic can run a compression test or leak-down test to pinpoint the exact cause.
Don’t delay — running with low oil can cause engine damage or seizure.
Bonus Tip: Track Oil Levels Weekly
- Keep a small notebook or app log
- Check oil every 500 miles
- Top up if it drops below the “Min” mark on the dipstick
A little tracking can prevent major engine problems later.
Final Thoughts
Oil burning might sound serious, but many causes are simple and affordable to fix — especially if you catch them early.
Start with basic steps like replacing the PCV valve,how to fix oil burning, using thicker oil, and checking for leaks before jumping into costly repairs.
Regular maintenance and the right oil can keep your car running smoothly and save you hundreds (or thousands) in repair costs.