Quote:
Originally Posted by MRV99
I have a few quick comments. I know I don't post much but I have built my fair share of trans, diffs, and engines.
1) BMW new maintenance recommendations are based on a few factors. Govt pressure to reduce waste, BMW paid maintenance...
2) A CEO of a global manufacturing companies made a comment to me and my family while vacationing together. "If we build them to last like we used to we would run out of customers to sell our products to and our stock holders will not have that" This is a direct quote so I will not argue it. Believe me this company used to build items that would last a good 20-30 years but not anymore.
3) All mechanical parts wear with use and all fluids no matter how synthetic they are made break down. I have never taken apart a transmission or diff that does not have some metal shavings or wear that has occurred. If you think that ZF makes transmissions which are sooooo superior that they never need fluid change or better yet 100k changes well then they should never have a problem going out of business. I will bet that any trans will show wear even at 15k miles. I have had many conversations with techs outside the BMW shop and the ones that have been doing this for 15 years will say BMW new maintenance schedule is for car turn over and does cause the cars to prematurely fail.
Last and not least. Globalization has caused manufactures to build an item just good enough to survive and not last. Hahaha who ever heard of a plastic oil pan.....
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Fully agree MRV.
No matter how good a synthetic fluid is, it will pick up impurities that the filter may or may not eliminate while that fluid flows throughout the transmission. Whether it's a certified BMW mechanic at the dealership or BMW service manuals, they each have a vested interest in transmissions not lasting too long. Of course they are going to recommend practices that ensure money in the pockets of BMW board members, mechanics, dealership owners, transmission manufacturers or anyone involved in the process. If a transmission lasted for 500K miles, there would be fewer service calls that would negatively affect the income of many associated with BMW.
I would like to see one example of proof where a fluid/filter change negatively affected a transmission. I know if I was a service advisor or a BMW mechanic I would also suggest never changing fluid to ensure the continuation of business and income.
I just changed my trans fluid/filter at 100K miles and after putting on 1000 miles and even pulling a large trailer for 250 miles there was no doomsday scenario from changing the fluid/filter and "accepting a risk".