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2Addicts | BMW 2-Series forum Technical Topics Mechanical Maintenance and TSBs: Break-in | Oil & Fluids | Servicing | TSB scheduled maintenance

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      01-04-2020, 11:13 AM   #1
aerodavew
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scheduled maintenance

2014 M235
Is there anywhere I can see the recommended intervals for changing various fluids etc?
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      01-04-2020, 12:17 PM   #2
ScottSinger
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at time of delivery a SERVICE WARRANTY brochure is delivered, though no trans or axle fluid change out are posted - but I need to double check.
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Last edited by ScottSinger; 01-04-2020 at 12:23 PM..
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      01-08-2020, 10:42 AM   #3
MarcoZandrini
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Here are my recommendation:
1. Oil and filter: 5k-7k miles*
2. Manual transmission: 20k miles
3. Automatic transmission: 50k miles; full flush at 100k miles
4. Differential: 50k miles
5. Coolant: every 3 years

* OCI's depend on things such as:
1. Highway versus city driving
2. Track time, aggressive driving
3. Cold starts
4. Oil brand

I mention oil brand as Blackstone Labs sez that "consumer" synthetic oil last between 8k and 9k miles. Basically, the additives wear out. Consumer synthetic oil is actually made from either oil from the ground or natural gas. They have grade 3 base stock. Oils such as Redline and LiquiMoly are "true" synthetics as their base stocks are synthesized polymer chains. Their base stocks are grades 5 and 4, respectively.
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      01-10-2020, 05:52 AM   #4
cooolone2
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Never, ever "flush" the oil in a transmission... Just saying!

BMW recommended fluid service intervals increased to ridiculous lenghts when they began including it in their maintenance programs. Don't buy into "lifetime" oil, etc.

And yes, synthetics do have extended life before breakdown, but there is nothing wrong with being smart and using shorter intervals, ie, 5k mile oil changes. This, along with the well worn subject of "which oil is best", are searchable here and by using Google. You'll find enough banter on the subject to be reading for years! Lol.

Good luck!
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      01-15-2020, 08:51 AM   #5
MarcoZandrini
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Quote:
Originally Posted by cooolone2 View Post
Never, ever "flush" the oil in a transmission... Just saying!

BMW recommended fluid service intervals increased to ridiculous lenghts when they began including it in their maintenance programs. Don't buy into "lifetime" oil, etc.

And yes, synthetics do have extended life before breakdown, but there is nothing wrong with being smart and using shorter intervals, ie, 5k mile oil changes. This, along with the well worn subject of "which oil is best", are searchable here and by using Google. You'll find enough banter on the subject to be reading for years! Lol.

Good luck!
Why never flush an automatic transmission?
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      01-15-2020, 09:55 AM   #6
ScottSinger
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Quote:
Originally Posted by MarcoZandrini View Post
Why never flush an automatic transmission?
I think some manufacturers recommend use of a machine to flush transmission fluid ?

But universal machines that do different manufacturers cars...I donít know if that is good.


Donít they say engine oil flushed are problematic?
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      01-15-2020, 08:03 PM   #7
John in VA
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Quote:
Originally Posted by ScottSinger View Post
I think some manufacturers recommend use of a machine to flush transmission fluid ?
But universal machines that do different manufacturers cars...I donít know if that is good.
I've had the E46 & E39 automatic transmissions flushed at an indy shop using the BG power flush machine. No problems.
https://www.bgprod.com/catalog/trans...change-system/
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      01-16-2020, 09:21 AM   #8
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Quote:
Originally Posted by MarcoZandrini View Post
Why never flush an automatic transmission?
Some old school guys think that if you swap out the fluid then it'll be to slick causing your trans to slip. It's not really the case in modern transmissions.
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