I got a reply from Blackstone Labs.
Quote:
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We like to see at least 5,000-10,000 miles on the oil for a gear lube like that. Anything less and it's going to be difficult to gauge how well, or poorly, the transmission is actually wearing. Let me know if you have any other questions.
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He didn't tell me I'm crazy or anything, so I think I am going to source the gear oil and find a time to put it in.