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      11-13-2010, 05:52 AM   #15
Spydeputy
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Drives: 2015 F23 M235i/2008,E90,335xi
Join Date: Aug 2008
Location: The County, Maryland

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2015 M235i, F23  [0.00]
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OP, look at your service ticket, it will say what they did.
If there were no changes made I suspect it is your But Dyno telling you the car is faster.
It's not coming from having cleaner oil, less friction.
Oh, and I strongly recommend you change the oil between what the dealer is doing,
if you plan to keep the car past it's warranty.