[Vwdiesel] cycling glowplugs

[Chuck Carnohan]

Interesting observations Gerry Wolfe.  All I know is that the Dino
Rotella pours easily in cold temps.  It is the only multi-viscosity
diesel rated Dino oil that I have seen that appears to stay quite liquid
when cold.  Synthetic is best in the deep freeze of the great north
but.... I would bet that Rotella might surprise some with it's liquidity
in the cold!  I know another diesel crazy in Maine uses it year-round
without a problem. 

This is what I noticed.  With other Dino oils such as Delo, with a
plastic valve splash deal it would take forever to refill the crankcase
during an oil change in the cold.  Oil was like thick syrup- like STP.
Rotella went right on down the gullet. 

I recently switched from synthetic to the Rotella just to see what it
would do.  So far I'm not noticing a big difference but it hasn't been
as cold as usual here in Idaho this year.  Heck, we haven't even seen
sub-zero this year!  At 5F my 1.6NA was a bit less talkative on initial
starter engagement but it started right up.

I still like block heaters whenever a plug is available!

Chuck Carnohan

-----Original Message-----
From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com]
On Behalf Of Gerry Wolfe
Sent: Monday, February 14, 2005 2:25 PM
To: vwdiesel at vwfans.com
Subject: Re: [Vwdiesel] cycling glowplugs


----- Original Message ----- 
From: <SLATERSFB at aol.com>
To: <vwdiesel at vwfans.com>
Sent: Monday, February 14, 2005 09:03
Subject: [Vwdiesel] cycling glowplugs


<snip>
 Up until this year I had always used 15w40 fossil oil & start up below
zero
degrees F was always dicey. This year I switched to 15w50 Mobil One. The
coldest it has been here so far is -12F & I had no problems starting
either
vehicle. With fossil oil, the pick up never would have started; Jetta,
maybe. I know that where you are temps get much colder than this, but
synthetic oil's gotta help.
... Bob in NY
</snip>
IMHO, viscosity of 15w40 fossil and 15w50 synth would be the same at low
temps (altho the synth prob'ly has the edge in ultimate low temp pour
point).
Also, I think the Mobil 1 is primarily intended for use in a gasoline
engines, used to be about CD level for diesels.  If yer looking for a
superior diesel synth oil, you would prob'ly be better off with a 5w40
or
0w40 diesel oil from Rotella, Mobil (Delvac) or Amsoil or similar.
I personally found a pretty big difference in winter cranking speeds
going
from Rotella 15w40 fossil to Rotella 5w40 semi-synth.
Just my $0.02Cdn...

rgds, g.

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