BMW table specifying maximum level of each wear metal.

[Gavin Buckle]

Does anyone know if BMW have released a table specifying maximum level of each wear metal per service period?

 

[autogs]

you will prob have to ask that question again in english

 

[Nice 'n' Fat]

 

[Pukmeister]

Not to us mere punters they haven't, and probably not to their dealer network of fitters either.

 

[duckspeed]

Not to us mere punters they haven't, and probably not to their dealer network of fitters either.

Ohh, I think they prefer the term "Technician" means they can charge more ..........

 

[tanneman]

Are you asking about the magnetic plugs on the gearbox and final drive?

 

[Gavin Buckle]

Some Original Equipment Manufacturers (OEM's) produce tables specifying the maximum level of each wear metal. The presence of these metals can be detected and tracked with an analysis of the old oil.

 

[savage]

Larger lumps = greater levels of worry

Ignorance can be bliss.

 

[Bendy toy]

We used to run ultra fine mesh bypass filters in mobile plant. They cleaned out so much fine contamination the oil was topped up, but hardly ever had to be changed. Regular lab tests replaced oil changes and the plant could spend even more time moving coal.

 

[David Lee]

Do you mean stuff like minimum thickness of brake discs?

 

[flatdog]

Some Original Equipment Manufacturers (OEM's) produce tables specifying the maximum level of each wear metal. The presence of these metals can be detected and tracked with an analysis of the old oil.

Correct;
In order to determine how machines perform in certain conditions, OEM's do analysis of the oils using standard engines and 'benchmarked' filters and spec. This shows the wear and tear effect the conditions have on engines in different environments.
Oil analysis determines the types of metal wearing out within the engines in different conditions.

So loosley:
Extreme cat:
hot, dusty, max torque under x load, continious running etc etc.= reduced cycle consumable changes (shorter service intervals), higher spec oil and larger volume filters. Perhaps larger sump and uprated oil coolers to increase hours between services.

medium cat: = less of the above.


Standard duty = std filters, service intervals etc..

However, AFAIK This type of info is generally used by manufacturers of vehicles that don't actually build their own engines and rely on the engine supplier to determine wear charactaristics.

I don't think BMW have to supply this level of detail to the public as thats what the alleged 1 million miles testing shows them internally.

God that got me rambling