[A4] Repair or walk away - advice for an Oil Sludge

[Tihol Tiholov]

"John S. Lagnese" <jlagnese at massed.net> wrote:

> ... in my  90,000 mile 91 200 TQ 20V? The oil pressure
warning comes on occasionally. I have 4.5 bar of pressure.

If the warning comes on with 4.5 Bar pressure, it might be the oil pressure
switch going.
Warning when buying a new one: I had a false warning (Typ 89 NG) from a new
oil press. switch at 3K RPM and from the check system with ign. on after
about 20 sec.  It turned out it missed an "A" in the end of an otherwise
identical P/N.  $50 lesson.