It's coming from the turbo oil drain pipe. There's an o-ring where the drain pipe enters the block. Really dumb design.

I'm in the process of debugging a new (to me) 2000 V40 with 80,000 miles. Car has some vibration around 60 mph. I've had the wheels balanced but the vibration remains. There's some side to side play in the passenger side inner CV joint, but there's also up-down slop in the driver's side driveshaft a...