For anyone thats been reading this post, just got word from six star speed that the turbo failed because of oil starvation. It did a number on the core and will cost more to get it repaired. Its still cheaper then a new turbo.

.055 should be adequate, but if something gets in there and blocks the flow of oil...

 

You might check with Subaru to see if there is an updated banjo bolt.

Did you check the bolts on both ends of the feed line for obstruction?

Saab used to reccomend replacing the oil feed line and bolts after a turbo failure. Not sure if Subaru reccomends the same be done but you might ask about that as well. I would at least flush the line out really well to make sure there is nothing in there that could block oil flow to the new turbo.

The banjo size may be why many Subaru turbo go out before there time, i think that many of them are because of design work done by subaru which costs turbo user's a lot of money over the years.

I have some picture sent to me by Six Star Speed, please have a look at what "oil starvation event(s) can do to your turbo's.

Ok guys i got my turbo back today, and i for one think it came out great. Thanks to the guys at "Six Star Speed Subaru Performance Specialists", please check out the pictures of it, the ceramic coatings came out great and the PnP is smooth as glass and no more movement at the shaft. They also gave me new seals for the up pipe, and the exhaust, one more thing is a new flex oil line to the turbo.

That is beautiful! What did they charge for that service? Just for future reference.

Just a comment: I don't know if Subarus are like other cars, but sometimes "oil starvation event" just means "turned off the engine while the turbo was still doing 100k RPM".

 

As for the size of the hole in the banjo bolt, larger holes/more oil flow is not always desirable. Hydrodynamics is a really fun topic...

Total cost was $696, which covered the rebuild and needed moving parts, PnP, 2 coating on the turbines, center bearing housing, compressor wheel, turbine shaft and wheel. All that and new seals for up pipe, and exhaust, plus SS teflon line to the new banjo bolt ( which is little larger then stock, oem is .055 replaced with .060 ) and an fitting from the avcs pipe to the new line.

I for one feel them a small increase in the banjo bolt should not overload the turbo with oil, i feel safer with a little more lub to the turbo then less because i don't care to do this again.

It also comes with a 2 year warranty on the turbo from Six Star Speed, so to me it was a good deal.