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06-30-2014, 06:13 PM | #23 | |
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By the way, I didn't read that the first time. That seems a bit odd they wouldn't just change it with new oil. I was referring to the fact you should make friends with your tech so they will be more likely to speak up about "judgement calls" (i.e. replace gearbox oil or reuse because it is "lifetime fill") |
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06-30-2014, 09:10 PM | #24 | |
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Yup, I should've asked more in-depth w/ the tech. Too many things happening that day, will give him a shout later on. Thx for the reminder. |
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07-01-2014, 03:36 AM | #25 |
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I suggest you purchase 2 liters (our diff contains 1,2lt fluid) of synthetic 75w90 gear oil for non limited slip diffs (''ns'' is the acronym by many manufacturers, i.e. no slip). The oem fluid is made by castrol but there are so many alternatives out there. It's as much as 25 euros over here for 2 liters. I change it every 30.000km and I can pretty much ensure you that even in that mileage the fluid is shockingly black. So much for lifetime fluids. If you intend to keep your car I also suggest you plan at some point to change the dct oil pan and fluids and do this at the dealership only as it gets very tricky. This will set you back around 600$ unfortunately.
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07-01-2014, 07:06 AM | #26 |
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Can someone direct me to the CBS intervals for our car? The iDrive doesn't list everything (no plugs, air filter, etc...) and I'd like to know what's coming up without going in for a key read.
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07-01-2014, 09:32 AM | #27 |
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Air filter 20.000km
Cabin filter 20.000km/annually whichever comes first Brake fluids every 2 years dot4 only Cooling system flush every 3 years. Mixture of bmw fluid with tap water (not distilled according to bmw, a long conversation) Fuel filter practically longlife, it's located in the tank Spark plugs every 60.000km on N54. Every 30.000km if tuned (this is the official strategy for other platforms with N54 that have the performance package). That means 35iS vehicles should change spark plugs every 30.000km. There is no particular plan for differential and transmission fluids, the longlife label policy. I have found out that on 30.000km the diff fluid looked very-shortlife, I didn't taste it though, it was too black. My personal plan is to change the diff oil every 30.000km, dct oil pan and fluids at around 60.000-80.000km (still way to go in my case) and engine oil every 5.000km. Regarding engine oil I have used so far castrol 5w-30, 5w-40 and 0w-40 and I will stick with 5w-30 because it keeps temperature a bit lower than the other options. Will try Fuchs Titan 5w-30 next time though.
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07-01-2014, 12:14 PM | #28 |
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Guys, two links that might be useful. a DCT service kit and slightly discounted quarts of the DCT factory gear oil
DCT Service Kit http://www.ecstuning.com/BMW-E92-M3-...ain/ES2677651/ DCT factory fill gear oil https://www.getbmwparts.com/parts/20...?siteid=214672 |
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07-14-2014, 01:51 PM | #29 |
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Ok guys, thx for all your advice thus far. I'm still waiting for feedback from you that have actually changed their tranny and/or diff fluids. I think that only jannisa changed his diff fluid 30,000kms/18,000miles. My mileage is at a high 116,000kms/72,000miles and I haven't changed either.
I finally heard back from the tech that inspected the tranny fluid during the leak issue and supposedly he said that it was in "excellent" condition. I'm still amazed by that. I should've asked him to take a photo when he was at it but alas. The responses from the various dealers I've discussed w/ have not be helpful, virtually all of them toe the line and insist that both fluids are lifetime, only one suggested to change the diff fluid 120,000kms/75,000miles. I'm still planning to change my tranny fluid 160,000kms/100,000 miles...not idea when to do the diff fluid. Anyway, if anyone has real-life experience changing either fluid, I'd love to hear from you. Thx in advance. |
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07-14-2014, 08:15 PM | #30 | |
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When I DID care about this on my last "keeper" (a WRX) I used factory fill gear oil only, did first gear oil change at 15k mile (as per "Severe service" maintenance schedule) and did a used oil analysis to assess future gear oil change intervals. Hope that helps.... |
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07-14-2014, 09:18 PM | #31 |
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This is a silly question, but I assume that the brand/type of tranny and diff fluids used have not changed from before and since BMW moved over to the 'lifetime' policy?
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07-14-2014, 10:19 PM | #32 |
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I believe the list of approved oils gets updated regularly (and no one believes that the oils are lifetime... it is just that many (like me...) choose to ignore the need to change because the car won't be kept for long enough to matter)
For the DCT, I think it has only ever been that Pentosin oil on approved list |
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07-14-2014, 10:24 PM | #33 |
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No offense Nick, I would do the same if I leased, but this is why you should never buy an off-lease car.
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07-14-2014, 10:26 PM | #34 |
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True. Nothing has changed other than BMW's desire to minimize their in-warranty costs. It used to be that you couldn't change the engine oil enough...
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07-14-2014, 10:29 PM | #35 | |
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07-14-2014, 11:04 PM | #36 |
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I guess I want to know what the fluid condition actually is for those that did the fluid change, to see if really necessary at those intervals.
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07-15-2014, 06:10 AM | #37 | |
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07-15-2014, 02:44 PM | #38 |
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07-15-2014, 03:02 PM | #39 |
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Hmm, that's a good point, which leads to my next question if anyone has done that then.
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07-15-2014, 03:10 PM | #40 | |
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07-15-2014, 11:09 PM | #41 | |
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07-15-2014, 11:26 PM | #42 | |
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You get a printout back with wear metals found in the oil, the viscosity of the oil and the amount of additives less. Blackstone labs make a recommendation and say things like "based on the level of additives and the viscosity you could have used this oil for another X miles, or you should have changed it Y miles ago. Then you account for that recommendation the next time you do the change. In the absence of any members doing oil analysis on their DCT gear oil, you can use the "old school" interval of every 15k miles for ATF or 30k miles for manual gearbox and differential (either way, you are overdue, as per this line of thinking) EDIT: removed link Last edited by nicknaz; 07-16-2014 at 11:47 AM.. Reason: removed link |
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07-16-2014, 12:56 AM | #43 | |
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Thx, I have a copy of the old school maintenance sch also. I've read that apparently in our case perhaps the old school intervals are much too short, but no idea if that's correct or not. Last edited by tranquility; 07-16-2014 at 04:22 PM.. |
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07-16-2014, 05:45 AM | #44 |
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Nick, FWIW, Mike Miller requests that his maintenance schedule not be posted on the internet. It's copyrighted and periodically updated.
Tranquilty, Blackstone will test any oil in your car. The report is technical but their results and recommendation are written clearly.
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