Q: Excessive oil consumption and sooty exhaust

asked by on

My car has around 97,000 miles and I purchased it from a specialist dealer. The oil consumption in my car is excessive, approx. 1 litre for every 500 miles. On the left-hand side of the car, the exhaust becomes sooty after around 100 miles. Can you tell me what is causing these problems and what I can do to fix them?

Hello there,

A few different items can cause oil consumption. The most common is oil leaks, valve stem seals, PCV faults, or engine mechanical issues. Porsche 911’s are known to have some oil consumption that is considered normal due to the type of engine it is. Though 1 liter per 500 miles sounds excessive.

If you’d like to have this looked at, a qualified technician like one from YourMechanic will be able to diagnose your oil issue and determine if a fault is present.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Excessive oil consumption and sooty exhaust

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Loosing oil

Hello there, loosing oil can become a big problem with your 2010 Nissan Micra if left unattended. If no visible leaks are seen than you are correct the oil is most likely being burned. When oil is burned there are...

Q: Whistling noise when braking and accelerating

Hello. If the noise occurs when applying the brakes and not moving then you may have a failure in the brake assist. If it only occurs when the vehicle is moving then you may have a failure in one of...

Q: Car idle is jumping up and down during daytime but not at night or when daylight fades

What you are describing sounds like a dirty or failing idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.