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I've started doing used oil analysis for my HCH through Blackstone Labs. A basic UOA costs $25, and a TBN test (total base number) is an extra $10. The TBN test measures how much additive is left in the oil, which is what keeps the oil from becoming too acidic. For the first test I ran the oil for 10,000 miles (Mobil One 0W20) and sent in a sample. The findings were: wear metals look good, plenty of additive left, try 12,000 next time. I just sent in that sample this morning, I should have results in a few days. I was actually going to make a thread in the hybrid forum to share the results once I get the next result.
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