I drained the oil, and I have very fine metal in the oil. It looks like it is aluminum, and a magnet could not pick it up. Oil does not have more than 30 miles. What is the likely culprit? Engine idles okay, pcm log looks fine, no knock. Pulled a few plugs and they looked perfect. Car has a stock bottom end LT1. Am I completely screwed?

 

How much? How does the oil pressure look?
7lbs is a good bit on a stock bottom end - not if but when.

 

The oil pressure goes down to 10psi at idle after 20-30 mins. It used to be around 20 at idle. I recently added a restrictor on the turbo due to burning oil during boost. Now I only see some smoke after getting out of boost. Car is running 10.8 AFR during boost. The metal is really fine.

 

Sounds like the bearings have given up the ghost....

 

do you have blow by? i had a lot of fine metal from my piston ringland coming apart and low oil psi. goodluck man.

 

Sounds like bearings to me.

 

No blowby that I can tell... Car seems to run fine. Whatever it is, the magnet did not pick it up. I still have to cut the filter open. I was going replace the pan & gasket, but got discouraged after looking at that. I know it is on borrowed time anyway, but it was running real strong before the turbo. I am working on picking up an extra block to build up on the side. I will know more once I get the pan dropped.

 

Run 20w-50 in it now man. May buy u some time. I would also get one of those magnets that attach to the side of the oil filter just for any ferrous stuff in there.