michael wrote in message ...
With a slightly different arrangement at the top of page, it appears the
two studies are the same. They both have the email from the Fram
engineer.

http://people.msoe.edu/~yoderw/oilfi...lterstudy.html

http://minimopar.knizefamily.net/oilfilterstudy.html


michael


I used to use Fram filters because the anti-drainback valve was
well-designed. Then I started getting bearing and valve noise on
startup, so I cut apart the filter and found that Fram had gone cheap
on the valve, with no metal backing plate or spring behind the rubber
disc. Bought two Pennzoil filters, used one and cut the other apart.
Much better valve assembly. Bought some Kralinators (used to sell them
in the '70s) and found that they had gone cheap, too. I've cut a
variety of filters open and found that most are poorly made and look
like they're made in China now. The drainback valve rubber wrinkles in
hot oil and would be no good in any case.
The filter media in some is thin and has holes big enough to
drive a Kenworth through.
When Pennzoil goes cheap I don't know what I'll do. Maybe make an
adapter plate with a built-in anti-drainback in it?
Maybe a couple of big lawsuits might force the filter makers to
smarten up and put in the quality we're paying for...

Dan