Date: Tue, 6 Nov 2007 08:23:41 -0800
Reply-To: Bill MacLachlan <billmacla@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Bill MacLachlan <billmacla@GMAIL.COM>
Subject: Re: Oil Filter performance
In-Reply-To: <47308024.4080905@gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
all I know FWIW is that when I used a Fram filter on my I4 50degree motor,
it often took a little while for the oil light to go out, and the engine
clatter to die down when the motor started. If I use a Mann this issue
disappears. So I use a Mann filter. Unless the store is out then I use a
Bosch.
Bill M
82 I4 GL
On 11/6/07, Michael Elliott <camping.elliott@gmail.com> wrote:
>
> Hi Scott, you're right, of course, about how deeply oil filter performance
> has been studied. Big amounts of money and expensive engines are at stake!
>
> It has been emphasized on the list that Vanagon engines want a filter with
> a strong internal relief valve. As I understand it, this is to help hold
> oil in the galleries of the engine when it is not running, in order to
> minimize lifter bleed-down and subsequent rattle. This is often presented
> as a Mann or Mahle-only choice.
>
> Maybe buried in those "thousands of pages of reports and testing on oil
> filters" someone has evaluated the cleaning ability of that subset of
> filters which also provide sufficient back pressure.
>
> --
> Mike "Rocket J Squirrel" Elliott
> 71 Type 2: the Wonderbus
> 84 Westfalia: Mellow Yellow ("The Electrical Banana")
> 74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano
> KG6RCR
>
>
>
> On 11/5/2007 8:55 PM Scott Daniel - Shazam wrote:
>
> > There have been near endless testing and reports on oil filter
> performance.
> > Google it, and there could even be some in the archives for this
> group.
> > Lots has been done already. Like thousands of pages of reports and
> testing
> > on oil filters.
> >
> > -----Original Message-----
> > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
> Of
> > Michael Elliott
> > Sent: Monday, November 05, 2007 8:47 PM
> > To: vanagon@GERRY.VANAGON.COM
> > Subject: Re: Oil Filter performance
> >
> > A worthy experiment!
> > --
> > Mike "Rocket J Squirrel" Elliott
> > 71 Type 2: the Wonderbus
> > 84 Westfalia: Mellow Yellow ("The Electrical Banana")
> > 74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano
> > KG6RCR
> >
> >
> >
> > On 11/5/2007 8:24 PM Dennis Haynes wrote:
> >
> >> While many folk speculate or are convinced that Mann or Mahle filters
> are
> >> the only way to go, I have always had doubts that any filter is all
> that
> >> much better than another. The one thing that has not been presented
> here
> >> was actual facts on a filters ability to remove dirt. As some of you
> are
> >> aware I have become familiar and am now a true believer on regular oil
> >> analysis. This is a requirement for warranty for the Cat engine and
> >> Allison transmission in my motor home to allow extended drains.
> >>
> >>
> >>
> >> Back In March 2004, I obtained a 1988 Fox from the original owner. It
> had
> >> only 14,470 mile on it. I changed all the fluids, using synthetic oil.
> The
> >> tranny got Mobil 1, SHC 75w-90 and the engine got Mobil 1, 0w-40 and a
> >> Fram TG2870A filter.
> >>
> >>
> >>
> >> 6,000 miles later I took an oil sample and sent it out for test.
> Results
> >> for wear metal were as follows. Copper was 20, Iron 20, Lead 8, Silica
> >> (dirt) 19. oil condition rated "A".
> >>
> >> At 13,500 miles on the oil, the numbers were slightly higher , 36, 66,
> 35,
> >> 21 with a recommendation to change the oil and filter due to wear
> >> particles. Condition "B". This took me by surprise as I usually get a
> >> suggestion to change oil based on oxidation, nitration, or in the case
> of
> >> the Diesel engine soot loading.
> >>
> >> So I changed the oil and filter, again using the Mobil1 0w-40 and Fram
> TG
> >> filter. I also replaced the air filter.
> >>
> >> ~11,000 miles (one year later) I did the oil testing again and got
> similar
> >> results. Condition "B". So I changed the oil and filter except this
> time I
> >> used the Mahle OC47.
> >>
> >> My wife has been using the car a lot so we quickly did 11,000 miles and
> I
> >> did the testing again. The results were alarming. Condition "C".
> >>
> >> Copper was up at 78, Iron at 115, Lead at 100, and Si at 53. This with
> >> only 53,000 miles on the engine.
> >>
> >> I changed the air filter and also the oil and filter. I am now trying
> the
> >> Mobil 1 filter.
> >>
> >> We'll see what happens.
> >>
> >>
> >>
> >> Dennis
> >
>
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