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Nick in Fayetteville · 06-23-2019, 11:18 AM

I usually run 50/50 and get good results. However, when I run plain tap water, I add about a half cup of 30 weight motor oil to reduce rust problems. Works for me.

06-23-2019, 11:18 AM	#10
Nick in Fayetteville Senior Member Join Date: May 2010 Location: Fayetteville, NC Posts: 341	Re: Just purchased and New Berg Radiator Wow I usually run 50/50 and get good results. However, when I run plain tap water, I add about a half cup of 30 weight motor oil to reduce rust problems. Works for me.