It all depends on what you used already. If it was just typical conventual oil then yes. This is what my engine builder recommended and what I use. I used that on intial oil when engine was built. I just did oil change .( aprox 500 miles) Penzoil synthetic 10W30 Yes, I'd pour in some zinc additive to that oil. Next time use Valvoline VR1 or the Lucas hot rod oil so you won't need an additive.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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