[s-cars] new car - a few misc quesitons

[Charles Rose]

So I bought my first audi yesterday.  A 1993 S4, silver with black interior
and I absolutely love the car.  It's got 138k miles and a few tasteful mods
including mtm stage 1 ecu, stromung exhaust, and rs4 replicas. 

 

Anyway, I've been reading just about all the emails on the list for the past
couple weeks to learn all I can about the car.  I want to change my oil and
oil filter this weekend.  From what I've read on the list recently, I
figured I'd go with the mobil 1 5w40 suv if I can find it and if not I guess
the regular mobil 1 0w40 and for the filter im gonna go with the Mann w
730/19.  My question is where can I find these oil filters? I called around
to a few local places and they did not stock them.  Do I have to get it from
a dealer to get them locally or are online stores the only sure sources?

 

The keyless entry doesn't seem to work.  I was only given one key with the
car, I called the stealership and they wanted $102 for a new keyless entry
key, is there anyway around paying that to make my keyless entry work?

 

Also the oil pressure gauge normally shows 2 bar at idle and goes to near 5
during most driving.  However when I am above say 3k rpm it seems like it is
as far past 5 as it can go.  Is it normal for the oil pressure to be this
high? like it seems to be spiked as high as it can go sometimes.  Could this
possibly be due to too much or too little oil? I haven't checked how much
oil there is yet.

 

Any help is appreciated,

-Chuck