Noticing your car’s oil levels drop faster than usual? Smelling burnt oil while driving? It could be more than just a leak—your car might be burning oil. And no, it doesn’t mean your car’s days are numbered (not yet, anyway), but it is something you shouldn’t ignore.
Let’s break down what it means when a car is burning oil, why it happens, how to spot the signs, and what you can actually do about it.
What Does It Mean When a Car Burns Oil?
Burning oil happens when engine oil gets into the combustion chamber and burns along with the fuel. It’s not supposed to do that. Oil’s job is to lubricate the engine, not go up in smoke. But in aging engines—or engines with worn components—it can sneak into places it shouldn’t be.
And here’s the thing: you might not even see a leak, but your dipstick will show you’re losing oil.
Common Signs Your Car Is Burning Oil
Before you start panicking, here are some clear signs to watch out for:
- Low oil levels between changes
You’re topping up more often than usual, and there’s no visible leak? That’s a red flag. - Blue smoke from the exhaust
That bluish tinge in the exhaust fumes? That’s oil burning off. - Burnt oil smell
A strong, acrid smell after driving, especially after a cold start, could point to oil combustion. - Engine misfires or rough idling
Oil getting into spark plugs or combustion chambers can mess with performance.
Why Is Your Car Burning Oil?
There are a few usual suspects when it comes to this issue:
- Worn piston rings
These keep oil out of the combustion chamber. If they’re shot, oil sneaks in. - Valve seals or guides are damaged
These stop oil from dripping into the engine cylinders. When they fail, things get smoky. - PCV (Positive Crankcase Ventilation) valve issue
A faulty PCV valve can force oil into the air intake system and into the combustion chamber. - Old engine with high mileage
Sometimes, it’s just age. Older engines naturally loosen up and may burn more oil over time.
What You Can Do About It
Here’s the good news: depending on the cause, you can do something about it—even if your car’s not brand new.
✅ Top Up Regularly (But Monitor Closely)
If it’s a minor issue, just keeping oil levels in check might buy you some time. Use the manufacturer-recommended oil type and check your levels every couple of weeks.
✅ Switch to High-Mileage or Thicker Oil
Some high-mileage oils are designed to swell seals and reduce oil burn. Thicker oil can sometimes reduce how easily it slips past engine parts.
✅ Replace the PCV Valve
This is a relatively cheap fix and could solve the issue if the PCV system is the culprit.
✅ Visit a Mechanic for Inspection
A trusted mechanic can run a compression test or inspect the valve seals and piston rings to pinpoint the exact problem.
✅ Decide Whether It’s Worth Fixing
If the repairs are going to cost more than the car’s worth (especially for older vehicles), it might be time to think about selling it to a wrecker or a cash-for-cars service instead of pouring more money into repairs.
When It Might Be Time to Move On
If your car’s burning through oil faster than you can top it up, and repairs are stacking up, selling it might be the smarter move. Local wreckers and cash-for-cars companies often buy vehicles in this condition and still offer fair value—especially if the engine or other parts are still salvageable.
Quick Tip Before You Go
Don’t ignore the warning signs. Driving with low oil can cause massive engine damage—and that’s not something you want to deal with. Whether it’s a simple fix or a sign your car’s reaching retirement, keeping an eye on oil levels will always save you in the long run.
Got a car that’s guzzling oil? Reach out for a free quote—we’re here to help, no matter what shape your car’s in.
If you are in Upwey, and looking for a cash for cars service, this is the best way to visit us.
20A Station St, Bayswater VIC 3153