Oil---Synthetic or Natural

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#1 (permalink)

10-25-2004, 06:56 PM

jjtarnow

CC Member

Join Date: Apr 2004

Location: Millburn, NJ

Cobra Make, Engine: Everett-Morrison 514ci, 5sp Tremec

Posts: 100

Not Ranked

Oil---Synthetic or Natural

I have a 514ci and my engine builder recently suggested I change from Royal Purple synthetic (had it since new) to Pennzoil Racing (natural..not sythetic). The reason? He thinks the non-roller cam 514's do better with natural oil vs. synthetic. Any thoughts? A 460 owner wrote me that when he went from synth to regular his motor started leaking (odd..usually happens the other way around!)...thoughts?

Josh

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