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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > oil change



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      03-03-2011, 01:51 PM   #1
pdips
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oil change

hey guys just wondering how often should we do an oil change on our 335s?

thanks
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      03-03-2011, 02:16 PM   #2
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every 15 thousand miles... i do mine every 10
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      03-03-2011, 02:50 PM   #3
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every 15 thousand miles... i do mine every 10
i do mine every 3k miles. Seems that its too long to do it every 10k miles
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      03-03-2011, 03:07 PM   #4
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i do mine every 3k miles. Seems that its too long to do it every 10k miles
I agree that BMW's recommended interval of 15k miles is too long to wait between oil changes, but isn't every 3k a bit overkill considering our cars use modern synthetic oil? I always thought that the "every 3k miles" thing was for more for conventional oil.

I change mine twice a year, or every 7500 miles, as I average about 15k miles of driving a year.
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      03-03-2011, 03:19 PM   #5
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I change mine twice a year, or every 7500 miles, as I average about 15k miles of driving a year.
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      03-03-2011, 03:24 PM   #6
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      03-03-2011, 04:48 PM   #7
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Quote:
Originally Posted by alex2112 View Post
I agree that BMW's recommended interval of 15k miles is too long to wait between oil changes, but isn't every 3k a bit overkill considering our cars use modern synthetic oil? I always thought that the "every 3k miles" thing was for more for conventional oil.

I change mine twice a year, or every 7500 miles, as I average about 15k miles of driving a year.
Even conventional oil will easily go 5~8k between changes. (My wife's 2000 Saab called for 10,000 mile changes with dino oil!). The "every 3k miles" thing is for those who use Jiffy Lube!

Being lucky enough to drive two BMWs, once per year works out to around 7,500 miles on each vehicle.

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      03-03-2011, 05:10 PM   #8
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fwiw, I changed out the factory fill early. Then another change. Both times I did a UOA. My UOAs tell me that under my own specific driving conditions that 10k on syn oil will be fine.
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      03-03-2011, 05:11 PM   #9
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change mine every 7k
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      03-03-2011, 05:16 PM   #10
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With high quality synthetic oil, 10K between oil changes should be no problem at all.
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      03-03-2011, 05:19 PM   #11
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whenever my car tells me to
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      03-03-2011, 07:25 PM   #12
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Every 10,000KM (6,000Miles).
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      03-03-2011, 07:30 PM   #13
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i do mine every 3k miles. Seems that its too long to do it every 10k miles
Way too often even with dino juice....like throwing money away and harming the environment at the same time...
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      03-03-2011, 07:43 PM   #14
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Once in between the schedule is a good rule.... every 7-8k or whatever......
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      03-03-2011, 07:52 PM   #15
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I do every 5k. It may be too often, but it's piece of mind.
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      03-04-2011, 01:03 AM   #16
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I do every 5k. It may be too often, but it's piece of mind.
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      03-04-2011, 05:57 AM   #17
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Quote:
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fwiw, I changed out the factory fill early. Then another change. Both times I did a UOA. My UOAs tell me that under my own specific driving conditions that 10k on syn oil will be fine.
I find it interesting that everyone who goes to Blackstone labs for a UOA comes back with a 10,000 mile OCI.
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      03-04-2011, 09:12 AM   #18
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~7,000 miles. From the UOA's I've seen on the M57 (diesel) the oil is ready* for a change @ ~10k miles.

*TBN at 2.0 or less.
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      03-04-2011, 11:37 AM   #19
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~7,000 miles. From the UOA's I've seen on the M57 (diesel) the oil is ready* for a change @ ~10k miles.

*TBN at 2.0 or less.
Do the diesels have the same plus or minus 15k CBS change schedule as the gas engines?

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      03-04-2011, 11:45 AM   #20
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Quote:
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every 15 thousand miles... i do mine every 10
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      03-04-2011, 11:46 AM   #21
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Quote:
Originally Posted by cotmfk View Post
I do every 5k. It may be too often, but it's piece of mind.
If you change every 5k you might as well use non-syntheitc oil.
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If no codes are being thrown use Chevron Techron fuel injector cleaner (concentrate). It solves rpm fluctuating upon cold start-up. Also, for most BMW problems start off by scanning your car with the Peake Research Tool. It contains the actual BMW codes. If you want to register a newly installed battery for free (just buy a $10 cable) and google/download BMWLogger
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      03-04-2011, 07:25 PM   #22
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About every 7-8,000 miles. I use Mobil 1 synthetic. My friend has a modified 335i and we both change them at about same time at his shop. Takes about 10 minutes each. If you have some drive-on ramps or some good jack/jackstands and some metric wrenches and it might take 15-20 minutes.
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