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Check out the Driven/Joe Gibbs LS30 high Zinc Synthetic. It's specially formulated for LS engines and is just a touch more than Amsoil. We have been using it on all of our shop builds and our own cars. It's good stuff!
As for the filter, we run the AC Delco PF48R.
Let me know if you have any questions.
Best regards,
Tyler
888-308-6007
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