Edmunds.com | Inside Line | Auto Observer Your Account | Help | Directory
You are here:
![[F]](http://a332.g.akamai.net/f/332/936/12h/www.edmunds.com/media/townhall/webxicons/site.gif){kind=small}
Forums
Sedans BMW 3-Series BMW 3-Series Oil Questions
258 messages, Last post on May 09, 2009 at 6:40 PM
You are in the BMW 3-Series Forum. Your Hosts are pat & karens
|
Replying to: Mr_Shiftright (Dec 19, 2007 3:47 pm) Why does the oil take a beating in the turbo engine over the NA one? Does the engine oil lube the turbo bearings and reduce oil integrity faster? Regards, OW |
|
|
Replying to: circlew (Dec 20, 2007 3:53 am) Yes and no. Yes, the engine oil does lube the turbo bearings, however, unless the there is a design flaw (like no water cooled turbine bearings, which should be on all new turbocharged cars these days) there's no reason why the oil shouldn't last as long as it does on non-turbocharged cars. I'm going to keep a close eye on the 335i oil thing because something just doesn't sound right. Best Regards, Shipo
|
|
|
Replying to: shipo (Dec 20, 2007 4:18 am) Other than looking at UOA reports on BITOG, what will you be doing to keep a close eye on it? I ask because I have the same engine as the 335i, and I'd like to do the same.
|
|
|
|
|
Replying to: circlew (Dec 20, 2007 3:53 am) Well, BMW DID finally get around to fitting oil coolers to all N54s, but the problem is more than simply high oil temperatures. Why does the oil take a beating in the turbo engine over the NA one? Does the engine oil lube the turbo bearings and reduce oil integrity faster? The oil does see higher temperatures in a turbocharged engine, and it is largely due to the fact that the sump oil also lubricates/cools the turbo bearings. I find it interesting that Subaru has now issued a TSB stating that all of their turbocharged cars must be maintained according to their "Severe Service" maintenance requirements. That means a 3800 mile OCI- though I'll note that Subaru does not mandate the use of synthetic oil. That said, I don't believe that it is the turbo so much as the fact that the N54 also features direct injection. The naturally aspirated DI V8 in the RS4 and the Mazdaspeed DISI 2.3 are also proving to be quite hard on their oil. If -as some UOAs are indicating- the N54 can thoroughly trash its oil in less than 5000 miles, it means that 335i/535i owners who change their oil at the  15000 mile OCI will probably be the proud owners of twin turbo boat anchors before their cars reach 100000 miles.
|
|
|
Replying to: bdkinnh (Dec 20, 2007 8:07 am)  Best Regards, Shipo |
|
|
Replying to: roadburner (Dec 20, 2007 9:15 am) Holy Moley! What's up with that? Can the owners collect if they opt for extended coverage? I know some scoff at the extended maintenance vs. do-it-yourself but in these cases, hopefully, there can be remuneration. I would strongly recommend testing the oil at regular intervals for sure AND changing it every 5-7K miles for that engine just to stay sane! The sad thing is you need to go through hoops to check your oil life through the sampling process Shipo encourages if you REALLY want to know what's happening in your engine. A stinkin' $15 dip stick would have made the task a cinch. Regards, OW |
|
|
Replying to: roadburner (Dec 20, 2007 9:15 am)
|
|
|
|
|
Replying to: nyccarguy (Dec 20, 2007 6:12 pm) I think you are right. The question is whether a rash of grenading older engines will have any impact on new/CPO sales. I guess we'll see... |
|
|
Replying to: nyccarguy (Dec 20, 2007 6:12 pm) On the other hand, watching BMW get rid of spare tires, dipsticks, oil coolers, and oil temp indicators tells me a lot as well. 
|
|
|
|
|
Replying to: bdkinnh (Dec 21, 2007 7:05 am) Yes, that about says it all...
|
|
You are here:
Forums
Sedans BMW 3-Series BMW 3-Series Oil Questions
New? Join Now!
Forum Tools
Search Forums
Browse by Vehicle
2010 BMW 3 Series
Browse by Board
Browse by Topic
Today's Chats
