Re: *How* cold in Canada? [OIL]

[Jon Auringer <J.Auringer@astronautics.com>]

Ian wrote:
> 
> Now this part always confused me, I'm running 10W-30 Mobil1 in PA, I
> understand that Mobil1 will flow a hell of a lot better in the cold (and
> heat for that matter) than regular dyno oil. So even though the oil is rated
> at 10W-30 it should still flow better than dyno oil of the same rating.
> Seeing as though it really doesn't get that cold in PA (I'm talking Canada
> cold) shouldn't Mobil 1 10W-30 be fine for the winter?

Here is an excerpt from a discussion we had about a month ago on the
subject of synthetic oils. I have added the data for the Mobil 1
10W-30.

--snip--
Well, Wisconsin isn't Alaska, but it still gets pretty cold here.
Ambient temperatures are often below 0 degrees Fahrenheit during the
winter. While my 88' 16V was still under warranty, I ran
conventional oils. Valvoline 20W-50 Racing during the summer and
10W-30 All Climate when the temperatures dropped. After 24,000 miles
I switched to Mobil 1 15W-50 year-round. To me, the synthetic seems
to allow the motor to spin over much easier for starting in the cold
than the 10W-30 conventional. As you can see from the table below,
the rated pour-ability would coincide with my observations.

excerpted from: More Than You Ever Wanted to Know About Motor Oil
                     By Ed Hackett <edh@maxey.unr.edu>


Brand                   VI    Flash    Pour    %ash   %zinc
-----------------------------------------------------------
20W-50
Valvoline Race         140      425     -10     1.2     .20
15W-50
Mobil 1                170      470     -55     ---     ---
10W-30
Valvoline All Climate  130      410     -26     1.0     .11
--snip--

10W-30
Mobil 1                160      450     -65     ---     ---


>TBerk16@aol.com wrote:

> >Mobil makes a 'colder' oil than that, For winter I'd go a bit lower. Change it
> >again in the spring/summer.

Mobil does make a 5W-30 version of Mobil 1. It has the same
pour-ability as their 10W-30. The lowest pour point listed in my
table is the AMSOIL 5W-30. It has a pour point of -76. Again, the
20W-50 Mobil 1 has performed very well for me even when we don't
break 0'F for daytime highs and we dip into the -20'F range for
overnight lows. Brr. Why do I live here again?!

Later,
	Jon
-- 
Jon Auringer
J.Auringer@astronautics.com

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