I did an early OCI (normally 12 month/3,000ish miles) on the Impala due to some seepage I found in the valley near the power steering pump- a common place to see seepage when lower intake manifold gaskets start to fail. I cleaned it up and so far the area has stayed dry, but I wanted to do a UOA just in case. Everything looks fine, although copper is somewhat high compared to other 3.4L reports I've come across. Not nearly high enough to cause concern, but it's something that I'll keep on. I plan on doing another UOA at my next OCI, as I just want to make sure I keep an eye on the status of the LIM gasket. Otherwise, the bulk oil looks fine, and it did it's job well enough. I replaced the bulk oil with 4 quarts of Driven 5W-30 from the 12 quart deal on Amazon last year.