Quote:
Quote:
Unless your engine has been kept very clean, Mobil 1 will start changing colour quickly because it's scrubbing your engine. It's not uncommon for an engine that's been run on conventional to cause Mobil 1 to turn black; that's because it's cleaning all the impurities from your engine.
On the other hand - there's always the possibility that the mechanic put your Mobil 1 in his toolbox for safe keeping and gave you dealer bulk oil.
Key words...
Scrubbing
Black
impurities
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I love where this board is going...
Sad, isn't it...