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      06-18-2011, 01:18 PM   #1
eoic.timmy
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Which oil for 335i

Just wondering, because ive never owned a boosted car. is there a recommended oil i should use for a 2007 335i?
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      06-18-2011, 01:42 PM   #2
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      06-18-2011, 02:01 PM   #3
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Mobil 1 synthetic 0W40, it's BMW approved.
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      06-18-2011, 02:06 PM   #4
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2008 BMW 335i  [4.00]
bmw spec is 5w-30.. part #07 51 0 017 866
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      06-18-2011, 02:07 PM   #5
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      06-18-2011, 02:10 PM   #6
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Total Quartz Energy 9000 0w30..BMW LL01 Approved
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      06-18-2011, 02:20 PM   #7
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Castrol 0w30 made in Germany
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      06-19-2011, 09:10 AM   #8
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Any oil that is BMW LL01 Approved, look on the back of the bottle and it will tell you. I use mobile 1 European formula
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      06-19-2011, 09:19 AM   #9
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Any oil that is BMW LL01 Approved, look on the back of the bottle and it will tell you. I use mobile 1 European formula
that would be 0w40 i suppose
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      06-19-2011, 12:45 PM   #10
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Castrol 0w30 made in Germany
Best LL01 option.
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      06-19-2011, 03:23 PM   #11
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The "problem" with ANY gasoline direct injection engine is fuel dilution and consequent lowered flash point and oil vapors laying down deposits in the unwashed (by gas) intake tract, particularly the backside of the intake valves. Add the high heat of turbocharging which generally accelerates the whole process and you have a motor which mauls the engine oil. So you want an oil with outstanding resistance to heat shear, and the effects of fuel dilution lowering the flash point, and, if possible, an oil that has really outstanding deposit control, and that maintains this performance for extended drain intervals.

Right now I don't think such an oil exists (it will be very interesting to see what oil BMW specs for the new M car turbo gdi motors). At the very least, you want a PAO or ester base stock to handle the major heat effects and fuel dilution (ester is better in this regard; doesn't vaporise as quickly and usually holds its viscosity better). Since you're talking about an '07 you're not tied to warranty concerns, so you can feel free to use any oil regardless of BMW LL01 approvals.

Because of the shearing, I'd recommend a 5w40 viscosity (allowed by BMW). Most 5w40s on the market are light 40 weights that shear back to a 30 weight anyway. There are a couple of 5w40 ester-based oils: Redline is one but strangely the tribologists (oil formulators) I know don't seem to think as highly of this oil as one might think. Don't know why. Motul 300V formulations are full ester base stock but are expensive and must be ordered online. The 5w40 ester oil that formulators really like is made by the German petro lube mfr Fuchs (Fuchs Silkolene Pro S) but its not available in the U.S. Supposed to be very, very high quality stuff. You can get the motorcycle version in the U.S. (Fuchs Silkolene Pro 4 Plus) that is supposed to be the identical formulation, but its expensive ($15-20 per litre) and hard to get.

The next choice would be a PAO base stock. There are a couple I have experience with and both are BMW LL01. Castrol 0w30 Syntec European Formula is made in Germany and thus known as the German Castrol. Its an older formulation but contains a lashing of special ester additive and it performs pretty well in the 335i N54 motor (I did some used oil analyses on the GC I used in my N54). I've also used a new formulation in the N54 from Shell, Pennzoil Ultra 5w40. It is the factory fill for Ferrari and its strong suit is supposed to be deposit control in gas direct injection engines. Pennzoil says it exceeds GF5 standards. You can order it online direct from Pennzoil.

Finally, there is the BMW service fill, BMW High Performance Synthetic 5w30. BMW and Castrol may have tinkered with this formulation over the ten years or so that it has been in use, but I don't know. My experience (UOAs) with it is that it performs very well in the naturally aspirated port injected BMWs but that it falls apart in the N54 (rapid shear back almost to a 20 wt then just as rapidly starts to oxidize and thicken back toward a 40 wt). It is probably a Group III+ highly refined petroleum base stock - - not a true synthetic. It is really a testament to the quality and robustness of BMW engines that the N54 can go 15k miles on this oil and not implode (just my opinion).

Someone mentioned Mobil 1 0w40. I don't have any experience with this oil. It will probably work as well as the GC and Ultra. Mobil is cagey though about the base stock. I've asked several times and they always say that this information is proprietary.

You can experiment with different oils and try to monitor the condition of the oil through used oil analysis. The trouble is UOAs don't tell you what's happening with deposits in the intake tract.

The fact is that fuel dilution and deposit formation are a fact of life with ANY turbo GDI engine, and this kind of engine hardware is fast becoming the norm. The new ILSAC GF5 standards for oil are supposed to be an attempt to deal with this. Time will tell. Fortunately, I have been told by one tribologist that he thinks BMW has much better piston ring technology that controls blow-by, and thus fuel dilution, better than other car mfrs. Keep this in mind as you are toodling along with the oil temp hovering at 250 F and the HPFP is slamming gas into the cylinders at around 1700 psi.

If it were me, I would use the best ester or PAO oil I could afford and I would change it OFTEN, very often. Monitor with UOAs and keep the flash point at 385 F or above if possible and never let the % fuel dilution go above 2%.
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      06-19-2011, 10:37 PM   #12
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I don't know why people like to make this topic more complicated than it is. Simple answer is a BMW LL01 oil defined as: ANY 5W 30 (N54) oil that is at least API SJ and greater, or ACEA A3/B3 or greater.
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      06-20-2011, 12:24 AM   #13
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My service advisor and the fill cap on top of my engine say Castrol...5w30 full synthetic. I know there are better lubricants out there...but until my warranty is up i'll likely stick with that.
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      06-20-2011, 02:39 AM   #14
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Look its really simple..any LL01 oil and your fine..what viscosity u choose depends on ur climate..i run a 0w30 weight b/c im in the northeast and want extra protection on cold starts

The fact is that there are other oils such as Total Quartz Enery 9000, which i run, that offer more detergents and better protection against oil oxidation...a certain BMW race team uses this and has performed oil anaylsis to prove its better than OEM BMW 5w30..I have spoken to them about this and totally defer to their experience

All oils are not equal that goes w/o saying..but either way as long as u go LL01 and change ur oil and filter at reasonable frequencies you will be FINE
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      06-20-2011, 07:10 AM   #15
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Quote:
Originally Posted by tibra1 View Post
Look its really simple..any LL01 oil and your fine..what viscosity u choose depends on ur climate..i run a 0w30 weight b/c im in the northeast and want extra protection on cold starts

The fact is that there are other oils such as Total Quartz Enery 9000, which i run, that offer more detergents and better protection against oil oxidation...a certain BMW race team uses this and has performed oil anaylsis to prove its better than OEM BMW 5w30..I have spoken to them about this and totally defer to their experience

All oils are not equal that goes w/o saying..but either way as long as u go LL01 and change ur oil and filter at reasonable frequencies you will be FINE
viscosity is not only climate dependent. its also engine dependent.
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      06-20-2011, 07:44 AM   #16
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What is a reasonable frequency?

I have read this thread and the other threads it links to and can not believe how complicated you guys have made choosing what oil to use in your cars.

I have never owned a BMW before and was looking for a simple answer to what oil and oil filter should I buy and how often should I change my oil? From reading all this crap where people are trying to impress me with their intelligence I still do not have an answer.

I think I'm going to use Catrol 0W30 and change it every 5,000 miles. Does that sound reasonable? And what filter should I used? I will probably go OEM, but where is the best place to buy it?

My oil was changed at the dealer right before I bought the car so I'm not in a hurry and have not really looked at the Owner's Manual yet on this subject.
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      06-20-2011, 09:09 AM   #17
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Quote:
Originally Posted by Turkeybaster115 View Post
I don't know why people like to make this topic more complicated than it is. Simple answer is a BMW LL01 oil defined as: ANY 5W 30 (N54) oil that is at least API SJ and greater, or ACEA A3/B3 or greater.
That is the whole problem. BMW LL01 is not defined. You can't make that assumption that ANY 5W 30 (N54) oil that is at least API SJ and greater, or ACEA A3/B3 or greater is ok as a LL-01 oil.

Here is the reason:

Castrol 0w-30 and Castrol 5w-40, do not meet API SN and SM standards, they do meet SL, SJ, ACEA A3, B3, and B4. Castrol 0w-30 is LL-01 approved and Castrol 5w-40 is not LL-01 approved. Other than LL-01 label they are identical.

Further, Castrol 10w-40: MEETS API SN, SM, SL, SJ, ACEA A3, B3, and B4 but it is not LL-01 approved. This oil meets two other criteria API SN and SM more than 0w-30 and 5w-40 and Castrol did not put the LL-01 label on it. According to your theory Castrol could have named 10w-40 and 5w-40 oil LL-01, but it didn't. So there is something more to this LL-01 certification because then Castrol who possesses LL-01 oil (ie:0w-30) could have stamped the LL-01 approval to the 10w-40 which by all other measures "looks, as per the specs" better than 0w-30 AND they could have stamped 5w-40 oil as LL-01 because it meets 0W-30w specs, BUT they didn't. SO why risk it and just use LL-01 oil.

Attached is Castrol's spec sheet which shows they only have one LL-01 approved oil (0w-30).
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File Type: pdf pds_syntec_usa.pdf (168.6 KB, 115 views)
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      06-20-2011, 09:14 AM   #18
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Quote:
Originally Posted by JimKW View Post
What is a reasonable frequency?

I have read this thread and the other threads it links to and can not believe how complicated you guys have made choosing what oil to use in your cars.

I have never owned a BMW before and was looking for a simple answer to what oil and oil filter should I buy and how often should I change my oil? From reading all this crap where people are trying to impress me with their intelligence I still do not have an answer.

I think I'm going to use Catrol 0W30 and change it every 5,000 miles. Does that sound reasonable? And what filter should I used? I will probably go OEM, but where is the best place to buy it?

My oil was changed at the dealer right before I bought the car so I'm not in a hurry and have not really looked at the Owner's Manual yet on this subject.
Castrol 0w30 with 5-7k intervals is good. use OEM filter. that oil is approved by BMW and its the ONLY real synthetic Castrol available in USA

edit: probably 7-8k intervals makes more sense.

Last edited by Kolyan2k; 06-20-2011 at 10:22 AM.
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      06-20-2011, 09:29 AM   #19
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TrackRat (and others) make some good points, and it definitely is possible to overcomplicate things. Here's a recent article on the subject of gdi and deposits -
http://www.autoobserver.com/2011/06/...-adopters.html.
You'll notice that BMW is not mentioned (to the good).

There is an ExxonMobil lubricants engineer who posts regularly on BITOG (the forum for the oil anal). He goes to the ADAC races at the Nurburgring each year and pals around with the various team race engineers, oem engineers, and fellow lubricants specialists, and will often give a report on the conversations. Fascinating stuff I think. A couple years ago, he mentioned that the number one topic of conversation was gdi and deposits. The consensus was (is) that there wasn't a whole lot the lube engineers could do about the issue - - rather it was something the oe makers would have to address, and that seems to be the gist of the article as well.
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      06-20-2011, 12:18 PM   #20
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OP: TrackRat is absolutely right. Just choose an oil that says BMW LL01 appproved on the back of the bottle and use an oem filter, and you'll be ok. As far as frequency of oil changes goes, you'll get a lot of differing and well-intentioned opinions (probably none fact-based). I have seen photos on BMW boards/forums of BMW motors, with the valve cover removed, run for more than 100k on the BMW 5w30 at 15k oil change intervals, and they look clean as a whistle and in great shape. I haven't seen any photos like that yet from an N54, but maybe soon.

I remember early in life being warned that when you want to learn about something, never ask someone who knows a lot on the subject, or even worse, thinks he knows a lot on the subject (like me). Oil threads are notorious for this sort of thing. I apologize to OP for muddying the waters. Hope you enjoy your new 335i.
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      06-20-2011, 03:19 PM   #21
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Quote:
Originally Posted by Kolyan2k View Post
viscosity is not only climate dependent. its also engine dependent.
Within the range of engine oils for this car...aka 0w30, 5w30, 0w40, 5w40...obvioulsy u dont wanna run 10w60...unless ur a dedicated track car
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      06-20-2011, 03:21 PM   #22
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Quote:
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What is a reasonable frequency?
Well def not 15K unless u've bought BMWs marketing hype.
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