why?

not sure of quicksilver's reasons but here are a few of why to avoid them:

-do not wrap your seat so it won't get dirty
-they don't really wash their hands...and they touch everywhere in your car
-although the service is fast...there are reasons why (quality)
-may use generic oil
-may steal from you (happens more frequently than you may think)

more technical things here http://www.jiffylubeproblems.com/
although i'm not sure how reliable it is...

...it's always safer to go to the dealer :thumbup:

Along with the WABBIT's comments, if they mess up something, put in the wrong oil, or commit some other kind of felenious assault on your BMW do you think BMW is going to cover those repairs under warranty? I don't think so. I know your saying Jiffey lube will fix their screw up's right? I don't believe they are qualified to make repairs on your ride correct. Then when you take it in to get it fixed at the dealer and they ask who's been screwing around with the engine.................? Well you get the idea.......right? :thumbup:

Oh I almost forgot. I use an independant BMW shop for oil changes. They are factory trained and the oil service is done every 7500 miles. Cost about $100.00

I don't know about the E70, but for the E53 and E46 BMW also has a "low mileage" oil change recommendation of 12 months. That is, you change the oil when indicated or every 12 months, whichever comes first. If you get a low mileage oil change then the dealer does not reset the service lights, so you get another change when indicated by the computer. The low mileage oil change is included under the free maintenance but is not well advertised. Check with your dealer to see if this recommendation holds for the E70.

See Post #6 :thumbup:

My Oil Change Thoughts - GC every 7 1/2K
 

If you plan on getting a new car every 3 or 4 years - I guess it really dosen't matter - other than following the owners manual.
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Regardless - I just can't follow this guide - even with the 8qt sump.
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I will make the first change at 5k, 10k, 15k then every 71/2K there after.
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Plan on using GC 0W-30.
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Call me crazy - but, I just wouldn't be able to sleep at night following the once every 15k rule.
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I use GC in my 1.8T and change every 4k - to give you some idea how
religious I am about oil changes.