Date: Wed, 10 Aug 2022 09:48:47 -0700
Reply-To: Bruce Todd <beeceetee@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Bruce Todd <beeceetee@GMAIL.COM>
Subject: Re: Engine oil
In-Reply-To: <B84BB2FA-25D2-44E6-B1C2-4E07238AC51B@shaw.ca>
Content-Type: text/plain; charset="UTF-8"
It was a year ago and I don't recall or feel confident enough to describe
the characteristics entirely - but it was enough for the mechanic to show
me. I am thinking likely it was the result of adding a small amount of
heavy duty oil stabilizer. Anyway - it is something I had never
experimented with before and likely won't again.
BT
On Wed, Aug 10, 2022 at 8:02 AM Alistair Bell <albell@shaw.ca> wrote:
> Interesting stuff bruce. I mentioned I recently filled up with synthetic
> 10w 60 to try it. Don’t know what to say about the non uniform looking oil
> you mention. I’ve just noted a bit of oil pressure increase over 20w 50
> when oil temps at 90C ( highest I’ve been able to get around town ).
> I chose the oil to see if it would keep pressure reasonable at 100C . Hope
> to find out in a week or so , going on a trip .
>
> Alistair
>
> > On Aug 9, 2022, at 3:02 PM, Bruce Todd <beeceetee@gmail.com> wrote:
> >
> > Lots of opinions on oil - that is for sure. For a brief period I was
> using
> > 10 W 60 synthetic but last summer after getting some work done on my
> engine
> > at a well known VW shop - one of the mechanics showed me a sample of the
> > oil which did not look uniform and told me they changed it back to 20W 50
> > non synthetic. This place has a good reputation and services both Audis
> > and VWs including Vanagons and has lots of synthetic oil available - so
> it
> > is curious why they went back to using conventional on my Syncro. In
> fact
> > any place I have taken my van for servicing where the oil has had to be
> > changed - it has always been conventional oil that it has been refilled
> > with. Perhaps a cost savings measure - or perhaps what is best for these
> > old motors?
> >
> > Bruce
> >
> >> On Sun, Aug 7, 2022 at 9:15 AM OlRivrRat <OlRivrRat@comcast.net> wrote:
> >>
> >> I always get curious, when I hear of NonSynthetic 20w50 being
> used
> >> in
> >>
> >> a Vanagon H2OBoxer Eng, as to what prompts the user to do that ~
> >>
> >>
> >>
> >>>> On 7 Aug , 2022, at 9:41 AM, Dan N <dn92610@GMAIL.COM> wrote:
> >>>
> >>> thank you Dennis,
> >>>
> >>> I wonder if there's something to do with the oil grade they recommend
> >> with
> >>> the RPM of the engines... On my ML430 suv it's about 2K rpm at 70mph...
> >> On
> >>> the vanagon it's 4K at 70mph. At 55mph it's about under 2K rpm for the
> >> suv
> >>> and about 3K rpm for the vanagon. The suv uses 5W40 synthetic, I use
> >>> non-synthetic 20W50 on the vanagon.
> >>>
> >>> On Sun, Aug 7, 2022 at 7:37 AM Dennis Haynes <d23haynes57@hotmail.com>
> >>> wrote:
> >>>
> >>>> Recently there was some discussion on engine oil. So I'll add more
> >>>> thoughts to the discussion.
> >>>> Recently I acquired a 2022 GMC Sierra Crew Cab, Denali. Has the 6.2L
> and
> >>>> 10 speed Allison. Will soon be having its 1st oil change done. Part of
> >> GM's
> >>>> plan to improve fuel economy is the use of low viscosity lubricants.
> The
> >>>> engine calls for 0w-20, the transmission use special low viscosity
> ATF,
> >> and
> >>>> even the axles call for 75w-80. I having a hard time wrapping my head
> >>>> around using the 0w-20 oil for an engine of this horsepower. To add to
> >> the
> >>>> confusion the hopped version of this engine for the Corvette calls for
> >>>> different oil.
> >>>>
> >>>> So doing some research I learned something that I never gave thought
> to.
> >>>> Engine oils contribution to an engine going into pre-ignition. Makes
> >> sense
> >>>> given some thought. There is always some oil on the cylinder walls and
> >> some
> >>>> part becomes part of the combustion process. For the Waterboxer this
> is
> >>>> relevant as there is also some oil laying in the bottom of the
> cylinder.
> >>>> For my engine it has active fuel management, (AFM). Glorified cylinder
> >>>> deactivation. Under certain load and speed conditions the cylinders
> get
> >>>> deactivated via a dance of turning off the injectors, and
> de-activating
> >> the
> >>>> valves. In this state oil that gets past the rings isn't burning off.
> >>>>
> >>>> GM addresses this as part of their Dexos specifications. The oils
> >>>> contribution to detonation is also of concern for engines that are
> >> direct
> >>>> injected and turbo charged.
> >>>> So to add to the confusion there is Dexos 1, generation 1, 2, and now
> 3,
> >>>> and Dexos 2. Now one would think that Dexos 2 would be the later or
> >>>> improved spec. It is not. Dexos 2 is for europeant vehicles which
> >> addresses
> >>>> that many European vehicles are Diesels. The performance for spark
> >> ignition
> >>>> engines is actually lower. The GM specs also include other ratings
> that
> >>>> also include fuel economy. Oils that carry the Dexos 1, generation 2
> or
> >> 3
> >>>> rating is limited.
> >>>>
> >>>> How does this apply to us? There are a number of folks that think
> heavy
> >>>> duty Diesel oils are a better choice for the Waterboxer. The
> >> pre-ignition,
> >>>> detonation control is just another consideration for using oils that
> are
> >>>> designed for gasoline, not diesel engines. Pre-ignition is the cause
> of
> >>>> most melted pistons and a contributor to rod bearing failures. For the
> >>>> Vanagon it is of significant concerns as due to all the other noise
> and
> >>>> design of the engine it is not easily heard when it occurs.
> >>>>
> >>>> Dennis
> >>>>
> >>
>
>
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