I have a 2005 Cayenne Turbo and at about every 2000 miles the check engine light has come on and the vehicle has need 2 quarts of oil. I have now driven it about 6440 miles and they just put the sixth quart of oil in. Porsche says this is normal break-in. I hate to say it but I didn't expect to be carrying quarts of oil with me and stopping along the side of the highway after the check-engine light come on and pouring quarts of oil in.

Has anyone else had this problem or is this Unique?

Frank

 

It seems that this is not to far from normal with the TT although some are MUCH worse than others. I would not expect a great improvement, nor would I expect a sympathetic ear from Porsche. Others will most likely respond with their own experiences.

 

My 05 CT burned through one quart at around 5000 miles. I had the oil changed at 8100 miles and I now have 15000 on it with no oil added.

 

Oil consumption went way down on my 04CT. I probably added 3 quarts over the first 10Kmi. I changed the oil @ that time, and now have about 16Kmi on the vehicle. I checked it a couple of weeks ago, and over the last 1,700 mi the oil went just below the 'X' in 'MAX' on the stick; looks like about 1/10 of a quart. Very acceptable.

 

1 quart every 2k miles on an '03 TT. No change in pace of consumption after 26k using 0-40W Mobil 1 under all driving conditions.

 

Averaging 1 qt. every 4-5000 miles with about 25K miles on the car. Make sure you drive hard during break-in to seat the rings.

 

My 04 CT has been steadily dropping. 3qt the first 5K miles, 2qts the second 5K. I'm at about 14,000 and have just downed another quart. First one since 10K.

The break-in procedure seems to be more important with this engine (and most high performance turbos) than with a more traditional engine. I've been vary careful to follow break-in guidelines.

Search the forum for Oil Consumption, this is a common thread.

Alex

 

The word is, turbos are not supposed to be driven hard and put away wet. You're supposed to allow turbos to cool down before shutting down, according to knowledgable owners on the 996TT board.

 

I've heard the same. However, I know that the CT has benefitted from knowledge gained from the various Turbos P-car has made over the years. I understand that the cooling system for the turbos is better and that the car automatically runs the fan to flush out excess turbo heat. I notice that it will sometimes run for a few minutes after a hard drive or on a warm day.

I think Wingless or some other member had a good explanation of why 911 turbos had problems with hot stops and how the CT is different.

Alex

 

I agree with Torags in one respect. Don't shut down the engine immediately after running at high revs. Especially don't gun the engine and then shut it off. If the turbo is still spinning it will do so without oil pressure after shutdown. This is Turbo-101.

I am interested in knowing whether or is not there is a heat issue with the Cayenne turbos similar to the 996. Comments from a knowledgable source would be much appreciated.

 

This is from Clark's Garage and I assume the turbo cooling technology has been improved for our trucks.

"Unlike the 924 Turbo, the turbocharger on the 944 Turbo was moved to the opposite side of the engine from the exhaust. This helped reduce the turbocharger inlet temperatures by approximately 160 °F. Additionally, the turbocharger has a water-cooled bearing housing. During normal operation, the cooling water is supplied from the engine cooling system via a tap on the low temperature side of the radiator. The cooling water returns to the water pump suction via a small thermostat or to the expansion tank if the thermostat is closed. During shutdown, coolant is supplied from the radiator and expansion tank and circulated through the bearing housing and back to the expansion tank. The water in the expansion tank is cooled by being siphoned through the makeup line to the radiator. Coolant circulation through the turbocharger bearing housing is supported by an electric pump. The combination of lower inlet temperatures and water-cooling to the bearing housing dramatically increased the turbocharger life expectancy over the 924 Turbo and 911 Turbo."

 

Here's bancu's posting from an earlier discussion. I believe that that the previous turbo heat issues have been largely solved by this new design.

Alex

 

Additionally, the V8 doesn't suffer from the oil residual in the Boxer cylinders (that is blown out at each start - hence more oil consump.) That said the turbo needs lube for additional bearing surfaces, so it will use more oil than non turbos.

 

Don't be too discouraged....my 2004 TT burned about 1 qt every 2000 miles for first 8,000......then suddenly stopped......I didn't have to add another qt till 12,000 miles. Who knows why ?

 

we've been burning 1 qt/1k for our entire 10k ownership of an 04 CT. at least all four of your tires weren't at the wear bars at 6k with a pregnant/new mom driving well over 95% of the time.