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Old 01-30-2019, 09:04 AM   #10
Rich Biebel
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Default Re: Royal purple 0-8w.

I once tried RP very thin oil in my Firebird Stocker.

Oil pressure would drop to near zero at low engine rpms...

I Dumped that oil out after 1 race weekend.....and it was no faster than what I was using before.....Mobil 1 10-30 or 5-30.....and oil pressure was always good with the Mobil 1 and it was faster than most other typical oils.....
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