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From: C. E. White on 20 Dec 2009 14:40

"Tegger" <invalid(a)invalid.inv> wrote in message
news:Xns9CE78C2AE60A1tegger(a)208.90.168.18...
> "C. E. White" <cewhite3(a)mindspring.com> wrote in
> news:IcadnU0hV85g2LPWnZ2dnUVZ_smdnZ2d(a)earthlink.com:
>
>>
>> "Tegger" <invalid(a)invalid.inv> wrote in message
>> news:Xns9CE6B87BF238Ategger(a)208.90.168.18...
>>> Frank Rowe <r0we'south(a)bell'south.not> wrote in
>>> news:3maqi5l2hlbn8qkce0ujkm8mrs9be5e9es(a)4ax.com:
>
>>>>
>>>> 2) Is there a non-synthetic 0W20 grade oil, and where can I find it?
>>>
>>>
>>>
>>> Not available. Even the 5W-20 is part-synthetic.
>>
>> Conventional 5W20 is availabel. See:
>>
>> http://www.castrol.com/castrol/genericarticle.do?categoryId=82915464&co
>> ntentId=6003410
>> http://www.pennzoil.com/#/motor-oil/pennzoil-conventional
>> http://www.valvoline.com/products/consumer-products/motor-oil/conventio
>> nal-motor-oil/1
>>
>
>
> Thanks for the correction. It's been a while since I checked.
>
> I had the notion that the first 5W-20s were all part-synthetic.

When Ford first switched to 5W20 they sold both a synthetic blend (Red
bottle) and a conventional 5W20 (black bottle). For some reason they stopped
selling the conventional 5W20 in the US, but continued to sell it in Canada.
Now I think they only sell the synthetic blend in both markets (again - I
think). Other companies started selling the conventional 5W20. The
Motorcraft 5W20 synthetic blend is still a real bargin, so that might be why
they stopped the selling the conventional. From what I have read, the
Motorcraft 5W20 synthetic blend exceeds the current top API requirements by
a wide margin and is a really good 5W20 for a lot lower price than Mobil 1
full synthetic. I've used both in my cars that require 5W20. When Mobil 1 is
on sale at Wal*Mart I thend to stock up on it. When it isn't, I sometimes
use the Motorcraft 5W20.

Ed

From: dr_jeff on 20 Dec 2009 21:03
mredd wrote:
> I WAS ALWAYS UNDER THE IMPRESSION THAT THE numbers on the oil indicated
> the lubricity(viscosity) of the oil ?

They indicate the viscosity of the oil. However, viscosity does not
indicate who well the oil lubricates. It indicates how well it flows.
You can have a very viscous solution of sugar water or honey, yet, that
does not mean that it lubricates well.

> Now I understand that the numbers of 5w30 10w30 etc indicate the
> viscosity of the oil.
>
> But what concerns me is what viscosity does 0w20 have at the 0 point ?
>
> None ? some ? or just what is going on here ?

It has low viscosity. That means that it flows at low temperatures
better than other oils. And, that means that engines get better
lubrication at low temps than with other oils, too.
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