Oh yeah - I forgot to mention, I changed the filter and topped off with a fresh quart of oil halfway through.

The premium synthetics are designed for extended drain intervals - Amsoil recommends 1 year or 25K miles (with a filter change halfway) for their top of the line oil, Redline 10-18K - though after my oil analysis results I am skeptical. Both oils run about $7-8 a quart.