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6768chevylover · 11-09-2017, 03:48 PM

You could run 20w50 with a zinc additive or can use Valvoline vr1 20w50 if you want the zinc already without adding the additive. I run either one with hot temps or cold temps.

11-09-2017, 03:48 PM	#2
6768chevylover Registered User Join Date: May 2007 Location: nepa Posts: 745	Re: What oil viscosity in fresh SBC in cold weather? You could run 20w50 with a zinc additive or can use Valvoline vr1 20w50 if you want the zinc already without adding the additive. I run either one with hot temps or cold temps.