Results & 2 questions :)

[msalem@ursa12.cs.utah.edu (Mark Salem)]

Hi Everyone,

well, because of your advice, I switched to Mobil 1 in my 5000TQ and it's 
pretty incredible: acceleration is smoother, higher revs are quieter, etc...
I highly recommend synthetic oil! ... Thanks for everybody's advice about this.

Now for my 2 questions: 
1) I have an ANNOYING squeak/rattle coming from the rear-left shocks; at
least I think it's from the shocks.  Strangely enough, it seems to disappear
when it gets cold; probably because the metal contracts, whichever metal
that is...Anyway, my mechanic says I can't do anything about it; but I just
can't believe I have to deal with this annoying sound.  PLEASE HELP...

2) my car over-vibrates about once a second at idle...and also, sometimes 
acceleration is a little hesitant...I assumed I had dirty fuel injectors
so I used quiet a few fuel-additives that were supposed to help...I didn't
really notice any improvement.  Could anyone please give me any hints
as to what it might be and what I could do about it?

Thanks a lot...I REALLY appreciate all what I'm learning from you guys!
   Mark.