Date: Mon, 5 Nov 2007 20:46:41 -0800
Reply-To: Michael Elliott <camping.elliott@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Michael Elliott <camping.elliott@GMAIL.COM>
Subject: Re: Oil Filter performance
In-Reply-To: <001e01c8202c$eb86a9a0$0201a8c0@MASTERPC>
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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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