Date: Tue, 6 Nov 2007 19:18:18 -0600
Reply-To: Max Wellhouse <maxjoyce@IPA.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Max Wellhouse <maxjoyce@IPA.NET>
Subject: Re: Oil Filter performance
In-Reply-To: <001e01c8202c$eb86a9a0$0201a8c0@MASTERPC>
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Dennis: If you have time, could you tutor us mortals with the oil
analysis process. I've always thought that you could buy your own
strips of test paper and soak it in the oil and get quickie results,
but that doesn't sound like what's going on here. Maybe I should
check out Wikipedia or something.
I once owned an Oberg filter system fro my 79 loaf,but the housing
apparently warped slightly and the two halves leaked. I'm not sure
if they still are in business or not, but I bought it from Gene
Berg(no relation to the company). The filter screen was stainless
steel and the oring on the outside was the seal. I think they
improved the housing after I bought mine.
DM&FS
At 10:24 PM 11/5/2007, 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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