TIME FOR AN OIL CHANGE

[AUDI1OO <AUDI1OO@aol.com>]

HI, I HAVE A 91 AUDI 100.  ITS BEEN ABOUT 2500 MILES SINCE MY LAST OIL CHANGE.
I JUST BOUGHT THE OIL FILTER FROM THE VW DEALER.  WAS THAT A GOOD OPTION OR
NOT, WHY?  I WOULD LIKE TO KNOW, FROM EXPERIENCE, WHAT IS THE BEST OIL TO USE
IN THE AUDI'S, ESPECIALLY IN THE 2.3 LTR 5CYL ENGINE.  SOON I WILL ALSO DO A
TUNE UP, ANYONE RECCOMEND ANY PARTS?  I WAS THINKING ABOUT BOSCH PLATINUM
PLUGS, AND A K AND N AIR FILTER.  ARE THESE PARTS GOOD?  WHAT KIND OF CAP,
ROTOR, PLUG, PCV VALVE, OR WIRES SHOULD I BUY?  SHOULD I GO WITH GOLD PLATED
OR NOT?    

THANKS