I agree - the proof is in the pudding. I'm surprised that you have gotten good results with the Fram filters as they have been slammed in the past. Perhaps that is not true with the tough guard filters.

http://people.msoe.edu/~yoderw/oilfilterstudy/oilfilterstudy.html

Where do you get your oil analysed?

One could argue that the intervals at which you change your oil and filters is more important than what brand of oil and filter you use...

It would be interesting to see if the people on the list with high-mileage engines have any comonality with what oil filter they use.

regards,
Todd
'88 westy

-------------- Original message --------------
From: "Dennis Haynes" <d23haynes57@hotmail.com>

> What really matters is the results. What is the actual effectiveness of
> the filter, in your engine? Oil testing will tell you. Everything else is
> non sense. Oil testing can be done for as little as $15. With it you will
> learn the following:
> Do I really need to change the oil this often? Why?
> What contaminants are getting in it?
> Is there any antifreeze leaking in there.
> Is the oil maintaining viscosity?
> Is it breaking down?
> Is my engine wearing prematurely?
> Is unburned fuel washing past the rings?
>
> Etc.
>
> I no longer use Mann or Mahle filters. Fram "Tough Guard" and the Mobil
> "1" are proving their worth. I will be trying others.
>
> Dennis
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> Todd Last
> Sent: Wednesday, August 27, 2008 12:06 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: NVC - Good article on technical analisys of engine oil filters
>
>
>
> http://findarticles.com/p/articles/mi_m0BQH/is_7_49/ai_n26972065
>
>
> Engine oil filters : technical and empirical evaluations of anti-drain
> back systems and element tubes
> Outdoor Power Equipment, June, 2006, by Paul Dilger, parts 1 and 2
>
> Unfortunately the articles have the photos omitted, bit it is interesting
> none the less.
>
>
> Todd
> '88 Westy
>