Is there an oil line on your particular super-charger? If so, the seal there could be blown and causing pressure to get to the crank-case.
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If you have been running it hard, the rings may be worn and causing pressure to enter the crank-case.Have you done a compression check?

There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!