Date: Thu, 4 Oct 2007 12:42:40 -0400
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: Cold-start up oil issue..a solution
In-Reply-To: <139495.81987.qm@web82703.mail.mud.yahoo.com>
Content-Type: text/plain; charset="iso-8859-1"
Conventional 20w-50 is good to the mid 20's. Below that you can have
starting difficulty and blown oil filters and cooler seals if time is not
given for warm up. 15w-40 will get you about 0. Below that you need to do
the warm up thing and use even lighter oils. Of course lighter oils such
as 5w-20 do not work well at extended higher speeds or distances in the
Vanagon.
The first number is the viscosity at 104F, the higher number is at 212F.
At 0F all sorts of things can happen and viscosity is not always
proportional with the ratings. Same thing goes for much higher
temperatures. Again, Synthetics rule in the extremes.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
David Kao
Sent: Thursday, October 04, 2007 12:05 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Cold-start up oil issue..a solution
No. I am not concerned about "dry" wear on engine start up.
It is the oil weight of 20 at cold start question. Most engine
wear occurs at the first few miles after a cold start. Is 20W-50
good enough or is 5W-50 better for reducing cold start wear?
This may be a question during winter only. 5W-50 is not widely
available. I am using 10w-40.
Yes, I keep hearing that 20w-50 works fine. 10w-40 has worked very
well for me too. But is there a difference? What is the difference?
What is better for winter?
I know once the engine warms up there is no difference any more. But
the wear happened before the engine warms up. I heard that each cold
start wear equals the wear of 200 miles of driving. I think dry wear
contributes to the cold start wear too. But it occurs only for a few
seconds.
Thanks for the accusump suggestion. That's something I haven't thought
about. BTW, I look forward to hearing your new trip report soon.
David
--- Don Hanson <dhanson@GORGE.NET> wrote:
> If you are concerned about minimizing 'dry' wear on engine startup, or
> perhaps use your Syncro at silly angles on rugged terrain, you may want
to
> install one of these accusumps. I had them in my racecars. They are
pretty
> simple and an elegant solution to the short period of time when you
first
> fire up, or if for any reason you uncover your oil uptake.
> I suggest using the electric switched model, the one that activates as
you
> switch on the ignition. Essentially, it 'pushes' 2-5 quarts of oil
through
> the oil galleries, pre-oiling the bearing surfaces before you turn the
motor
> over.
>
> http://www.accusump.com/
>
> Don Hanson
>
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