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Re: The oil change debate (archive)

[ Follow Ups ] [ 5-series (E39) Message Board ] [ Msg. Board FAQ ]

Posted by WAM on July 07, 2000 at 10:13:49:

In Reply to: Re: The oil change debate posted by BudH on July 07, 2000 at 09:13:46:

Just a little correction first, it is the marketing people who pushed the 15000 mile intervals because this translates into lower running costs, which gets a few more sales. The engineers tend to approve these requests because it is acceptable and not necessariliy recommended practice.

At 15000 miles a lot of junk is floating around in your oil and your filters are probably not doing an adequate job of fitering out particles.

I personally would change my oil at about 5000 intervals. After all there is no harm in changing oil early but running to 15000 is certainly questionable.

You will never get a definitive answer on this issue but remember that sales and marketing people tend to promise the earth.

: I have heard that the Audi/VW use the break-in oil, but that BMW does not.

: I have also heard that the BMW oil-filter will not last 15K miles. It breaks down around 10K and then the filter particles will jam the smaller oil feeders to the VANOS, etc.

: There is a Service Bulletin for this that describes an updated/upgraded filter. See the arcives.

: I plan to change mine out at 5K - 7.5K regardless.

: BudH
: '00 540iA
: Aspen Silver/Gray
: 2100 miles and lovin' it!

: : I had an Audi a few years ago and oil changes spawned quite a few debates on the message boards. A few things in particular stand out in my memory:

: : - The engineers know what they're doing, so don't mess with it - change the oil when it tells you to.
: :
: : - Definately don't change it the first time before 7500 miles, since they ship them from the factory with a special "break-in" oil to further hone the cylinders (never heard of this before).

: : - No way a filter can function properly after 10,000 miles.

: : I'm sure BMW's engineering is quite different from Audi's, but any comments on these points? Are any of them applicable?

: : I would also like to know what the best oil-changing strategy is - don't want to change it every 10k miles and then have to replace the motor at 80 or 100.

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