Skip the auto shop - Our mechanics make house calls

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 liter 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?

A: For your 2007 Porsche 911, the piston rings...

For your 2007 Porsche 911, the piston rings may be letting excessive oil past them causing the soot build up in the exhaust, and causing the oil consumption. There is an acceptable amount of oil consumption, and 1 liter for 500 miles does sound a little excessive, but the manufacture or dealer may say this is normal. I recommend having a compression test and a cylinder leakage test done to see if you have a weak ring and low compression in one of the cylinders. A certified technician from YourMechanic can come to your car’s location to diagnose any oil leaks and let you know if any adjustments or repairs are needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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

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: Oil type - 1999 Toyota Camry

Hello. I would suggest not putting in 20w50 oil as it is too thick and can cause engine damage from tight areas of the engine that will not get oil. You should use 5w30 only.

Q: What is that thing that looks like a wheel?

Hi, thanks for your question. I'm curious as to what part you are talking about. Where is this part located? Is it inside or outside of your car? Unfortunately, we will need further information and detail from you to properly...

Q: Steering/ front end vibration at high speeds

Hey there. I would recommend checking your intermediate shaft from the steering wheel to the rack and pinion. If the joint on your intermediate shaft has failed, this can cause the steering wheel to shake at certain speeds. If the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.