[s-cars] Boost issues

[TM]

It was a beautiful day today so I decided to take the Audi to work.....
BIG mistake. Couldn't see more than 13psi peak, 10psi continuous
throughout
the gears, everything seemed okay at the time.

I didn't think it was anything serious until I got a CEL and the oil
temp (?!?)
started rising mysteriously, while the coolant temp was not.

Proceeded to limp the car off the highway, got the car to a safe
location when
steam came out from underhood- still coolant temp is around 2/3, oil
temp went
to 150C, shut the car off immediately.

Found a broken radiator neck, will be replaced soon, but what to make of
the
oil temp rise? The CEL was from the temp sensor, that's all I've found
so far.

Any thoughts? I wonder if there was some sort of problem that was
limiting boost,
or if I just have a leak somewhere.

Taka
AAA Plus is great- free 90mi tow!