The Ford Barn - View Single Post - What was the approximate viscosity of 600W?

Barry in St.Paul · 06-25-2010, 07:00 AM

Interesting! I found this post in the old (98) ahooga archives that is the first I've seen to actually talk about the origination of the "600W" nomenclature: http://www.ahooga-archives.com/messages3/12396.shtml
An excerpt from this old post: "600W is not a viscosity rating. It is a trade name of sorts originated by Mobil. It simply became universally used. The book (old and yellowing)that my contact used listed three products. 600, 600W and Super 600. 600 was listed as a pure mineral oil equivalent to SAE 140W. 600W and Super 600 were compounded oils or oils that were thickened. They were roughly equivalent to SAE 250W. The oil we use today as 600W is supposed to be a compounded oil equivalent to SAE 250W. "

06-25-2010, 07:00 AM	#15
Barry in St.Paul Senior Member Join Date: May 2010 Posts: 118	Re: What was the approximate viscosity of 600W? Interesting! I found this post in the old (98) ahooga archives that is the first I've seen to actually talk about the origination of the "600W" nomenclature: http://www.ahooga-archives.com/messages3/12396.shtml An excerpt from this old post: "600W is not a viscosity rating. It is a trade name of sorts originated by Mobil. It simply became universally used. The book (old and yellowing)that my contact used listed three products. 600, 600W and Super 600. 600 was listed as a pure mineral oil equivalent to SAE 140W. 600W and Super 600 were compounded oils or oils that were thickened. They were roughly equivalent to SAE 250W. The oil we use today as 600W is supposed to be a compounded oil equivalent to SAE 250W. "