I got my oil analysis back from Blackstone Labs for the Tahoe. It has 10k miles on the motor and it was a 5k interval oil change.
The note about the water contamination was likely self inflicted. I used a water bottle to collect the sample. I blew it out with an air hose, but there was still some vapor on the inside of the water bottle. I guess it was enough to show up.
Looks like it's mostly in spec. They mention the high copper may be from breaking in. Copper can be a bad sign and indicate bearing failure. We know the crank main and rod bearings failures are real with this motor. I'm not terribly concerned, but may pull another sample at 13K.
The note about the water contamination was likely self inflicted. I used a water bottle to collect the sample. I blew it out with an air hose, but there was still some vapor on the inside of the water bottle. I guess it was enough to show up.
Looks like it's mostly in spec. They mention the high copper may be from breaking in. Copper can be a bad sign and indicate bearing failure. We know the crank main and rod bearings failures are real with this motor. I'm not terribly concerned, but may pull another sample at 13K.
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