Dealer Oil Changes

[ROBERT_S_ABBOTT@HP-SanDiego-om7.om.hp.com]

     So something dawned on me the other day... I've had two oil changes 
     done by a local VW dealer on my 98GLX.  I elected to go with the 
     Castrol Syntec which they charge me for - $5/quart (I know I'm taking 
     a bath on the oil, but that is not the issue right now).  So my 
     question is shouldn't I be getting a discount on the Syntec?  Isn't 
     the dealer is going to bill VW for the oil they DIDN'T put in my car 
     anyway?  It seems like I should be being billed the difference between 
     the cost of the regular Castrol versus the Syntec.
     
     I called VW - they're going to get back to me ...
     
     rob