Well, now that I have a few minute, here is the history:
  I purchased the Syncro with 110,000 miles on it
and the engine had been replaced at about 8,000
miles previously.  The engine oil looked like it had
8,000 miles on it also.  GEX sticker and plate on the
block confirmed it was almost new rebuild.  Since then
I have changed the oil every 3000 miles.  It had high
pressure buzzer going off the first summer I had it.
I curred this by running 20-50 and changing several
parts in the cooling system to bring the temp. down
to below the LED.  A year ago more pressure problems
after an oild change to Mobil oil.   I changed out the oil,
to another brand, seams to had fixxed the problem, thur
last winter and the summer.  Have used 20-50 weight
thru last summer. Now I changed oil again same problems.
This oil change I put in 2 qrts of 10-40 and 2 qrts of 20-50
since the extreme cold temp.  It now has 75000 miles
on the rebuild, head gaskets are leaking, and can be
causing a higher temp. Timing it advanced, and could also
be causing heat problems.  I think that installing straight
20-50 oil may have bought me some time, but not a few years.
This is what I was thinking last year, so the engine should
have been dead by now?
   What bugs me is I've change this oil every 3000 miles!
I can document each and everyone.  If this engine is bad,
it was bad from the day I got it!
                                             Eric

Robert Donalds wrote:

> EricI would guess that the engine has at least 140k on it or that some
> gas station has reassembled the engine and never inspected the oil
> clearances. dont blame the oil for low oil pressureBob DonaldsBoston
> engineHttp://www.bostonengine.com