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?

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

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!

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: My car has been leaking oil. my mechanic says that i can do a oil clean or a complete repair your recommendation

Hello - as a fellow Bimmer owner, I am also offended at engines which leak. You don't mention where the engine is leaking, and perhaps that is not clear. Most seals and gaskets on that engine aren't too difficult to...

Q: I want to buy a 2000 Porsche boxster but im scared about the ims going out how can i prevent that?

The majority of intermediate shaft failures is caused by debris getting into the bearings. Opinions vary but I'm of the opinion that if you want to prolong the life of that bearing as well as the entire engine, DO NOT...

Q: The car has no electrical power at all

Hi. I would recommend to have a technician check for any loose power or ground wiring. There also could be some corrosion present that is blocking the electrical current flow. I also recommend that the technician use a test light to...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...