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It is hard to justify extra oil changes. They generate graphite in the oil which is a lube enhancer, and don't generate nasty acids the way gas engines do.
Maybe some of you are old enough to remember Arco Graphite oil? They made that product by running the oil through an operating diesel engine. It was a very good conventional oil but was blacker than pitch because of the diesel produced graphite.
We are already doing extra oil changes. The oil change interval for the same engine on a Toureg or Q7 is 10,000.
The oil change interval for the same engine on a Toureg or Q7 is 10,000.
Well, same basic engine yes. Same tune, no. I've had both a Treg and a Cayenne, and can absolutely confirm that the Porsche is faster. And with the right tuning box, much faster. Here the details are sketchy, but more diesel fuel gets into the Porsche crankcase than gets into the Q7/Treg crankcase. It has something to do with a loop in the particulate removal system which combines engine heat with diesel fuel with urea (AdBlue). More diesel fuel contamination in the oil pan means more frequent oil changes.
If anybody's actually got details about why this is happening, I'm eager to fill in my knowledge gaps.
I'm skeptical. To me, the reason Porsche has oil changes every 5k is because of the inferior diesel fuel in the United States. The 5k oil change interval was instituted after the diesel pepper came here. Not all diesel fuel here is inferior but a lot of it is...not saying its bad fuel just inferior.
All this talk of the Cayenne Diesel engine being different from the Treg or Q7 is hogwash. Period. Don't believe the hype. Just because Audi and VW kept the interval at 10k here doesn't mean the Porsche went to 5k because of its engine is different. The Cayenne Diesel has 10k oil interval elsewhere, just not in the States.
Being skeptical is ok. But then using words like "hogwash" and "hype" goes considerably beyond skeptical.
You are however correct in inferring that US-refined diesel (outside California) sucks. Most folks in the ROW have access to 50+ cetane rated diesel. Most stations here dispense 40, unless you hunt out those who sell 45. California diesels surely run better than those is the other 49 states, as minimum 52 cetane is mandated out there.
I have the 2010 Touareg and believe the 5k oil change is to keep an eye on the overall emissions system as that is the major problem with modern diesels. New diesels exhaust fresh air compared to gas engines. I have over 100,000 miles on my T2. They are very technically advanced SUV's with very special VW 507 oil , adblue injectors, heaters and sensors. Most my repairs have been emissions related items such as adblue pump adblue injector, adblue heater, NOX sensor & EGR Valve. Love the torque, love the go anywhere any weather, every day car. Now considering Adblue and DPF deletes, but nervous about passing emissions after their gone. Maybe just drive another year and trade it in on a 2016-2017 CD hybrid, which I believe will be the next new Porsche offering: hoping for 400 ft/lb torque and 200 HP electric motor. Hold on there Baba Looey. Giddy Up.
Check your state's emission test process if you want to do a DPF delete. My state (VA) just plugs into the OBD port and makes sure its happy. So as long as there are no emissions codes, I could be spewing black smoke and still pass
Are you driving with it in? This was discussed when they first came to our shores, but the consensus from back then was that there is an oil pan difference and no good information on if the dipstick will read correctly and not interfere with any internals.
The first oil change in my 2014 Cayenne Diesel at 4,000 miles took a while....maybe 2.0 hours. I drained the oil from below, removing the front and rear trays from below. Much easier on the CD than in my former 928GTS...lot better ground clearance.
Tough to find the drain plug, as it is black, just like the oil pan. Found a picture on 6SpeedOnline.
Went to the dealer to get a filter, o-ring, crush ring and 9 quarts of Castrol 5W/30. Total in parts was $117.50, after my PCA discount.
I drained the oil and pulled a sample to send to Blackstone Labs for analysis.
I added 7.5 quarts of new Castrol Edge 5W/30 which meets the Porsche C30 specs. I have just ordered a case of Mobil 1 ESP 5w/30 and a Mann oil filter from Amazon for the next time for $117.
This is a pretty easy DIY project. Next time, I will drive onto four 2x12's to get another 1.5" of ground clearance.
I saw a 5 qt. castrol jug at Oreilly's for $38, and it might be cheaper at walmart.
04-26-2014, 12:03 PM
