All I can tell you is, after yet another conversation with Mobil Oil on your behalf, YOU should follow Kebowers advice to the letter!
There is no reason that Mobil 1 should account for ANY deposits in your engine at all! Call them, they are best positioned to resolve this, not us!
But! Let us know the result! PLEASE!
"We drive into the future using only our rearview mirror."
- Marshall McLuhan -
Northern California Wine Country...
"Turbos whistle, grapes wine..."