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04-17-2014, 07:52 PM | #1 |
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Oil change
I am interested to hear the community's thoughts on this...
Last month the oil change service notification showed up on my '08 e90 M3. Curious, I checked when the last oil service was, Mar 12, 2012. That seems very coincidental that it is roughly 2 years to the day that it has registered needing service...? The mileage was 27,349 at the time of the last service and is now 31,687. Sad I haven't driven it more than that!!! Is the service required due to some timeout value (2 years) or is the oil really broken down and needing fresh fluids? Thanks in advance!! |
04-18-2014, 09:30 AM | #3 |
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I change my oil at LEAST once a year or every 5,000 - 7,500 miles.
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04-18-2014, 10:59 AM | #6 |
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04-18-2014, 12:16 PM | #7 |
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Don't wait for that stupid thing to come on...change it at least every year. Honestly, this is probably why some people have bearing issues..the S65 is a high revving high compression engine to change the oil every two years is insane to me...
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04-18-2014, 01:50 PM | #8 | |
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Totally understand the engine is high revving performance built. My understanding of the reasoning for changing the oil is that it breaks down due to engine wear and temperature and thus can not lubricate as well. Am I missing something in regards to why changing the oil early, less than the 7,500-15,000 miles? Thanks! |
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04-18-2014, 03:53 PM | #9 | |
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04-18-2014, 05:47 PM | #10 | |
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It's very minimal (almost immeasurable), especially with the huge oil sump. I wouldn't bother with a yearly change if you're only doing a few thousand miles. That's just draining perfectly good oil. The two year interval for a low mileage car is perfectly fine. If you don't believe me, pay for an analysis and request the TBN & TAN be measured. I bet both will come back just fine.
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04-18-2014, 06:55 PM | #11 |
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BMW recommends M3 oil changes at least once a year . While the car is under warranty, BMW will do the changes under the free maintenance program, so you know they are serious .
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04-18-2014, 07:17 PM | #12 | |
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Just because BMW recommends it under their free maintenance program or not doesn't mean it applies in every situation. In this case it seems to be a general rule of thumb, change the oil once a year or at least before 15,000 mi (appears some if you do it even at 7,500 mi as well). What about us that drive our M's on the weekends for enjoyment and aren't tracking them? The only argument posted so far for changing the oil at least once a year is because the oil breaks down on its own over time. This seems suspiciously overstated? If the expected life of this particular oil is up to 15,000 mi, it doesn't make much sense that it would deteriorate on it's own with little or no use in 12 months?? What am I missing here? |
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04-18-2014, 07:27 PM | #13 | |
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http://www.mobiloil.com/USA-English/...Motor_Oil.aspx
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04-18-2014, 07:40 PM | #14 | |
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And OP, yes BMW recommends changing once per year and will cover it under Ultimate Service -- and yet the iDrive interval is programmed for 2 years. No idea why.
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04-18-2014, 09:41 PM | #15 | |
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No they don't. I'm looking at the Service Maintenance Substitute Checklist right now. Gasoline engines: 15,000 mi There is no time interval listed. It is a CBS (condition-based service) interval, meaning the engine computer is using variables like ambient temperature, driving style, current oil quality, etc. to determine the change interval. If you start doing lots of short trips, the interval will fall more quickly. If you are doing a lot of highway driving, it will extend the interval.
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04-18-2014, 09:43 PM | #16 | |
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All it takes is 15-20 minutes of highway driving on occasion to burn the stuff off. I wouldn't even worry unless 99% of your driving is 2 miles to the grocery store and back. The vast majority of people don't experience these problems. Even my cars, which can sit for several weeks without being driven, have never returned a UOA showing any water. (they've always shown 0.0)
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04-19-2014, 12:05 PM | #18 | ||
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But why would you want the contaminants and the like just sitting for 2 years? Also, the CBS is based on modeling and simulations of various factors and not an exact science. It's for this reason that the service include a oil change interval of a year regardless of the mileage. Last edited by TheIceStormOf06; 04-19-2014 at 12:07 PM.. Reason: New poster error |
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