switching to synthetic oil

[Mullen, Shaun]

I have run Mobil 1 in my previous A4QM Avant.  I am now driving a new A4Q
Avant that has dealer-installed Pennzoil 15W40 oil.  I would like my dealer
to drain the oil when I go in for a January servicing and replace it with
the Pennzoil synthetic 15W40 that they use in the Porsches they sell and
service.  I don't anticipate any problems with making the switch.  Anyone
care to argue that I should go back to Mobil 1 -- which held me in good
stead with my old Avant -- rather than go with the dealer's Pennzoil
synthetic?

Shaun Mullen
Yorklyn, DE