People can't get the same answer twice out of Fram lately. Before they changed hands a couple of times and when Motorking was still working for Fram and active on this board, it was easier to get accurate information about their filters because he had a direct access to the Fram engineering department. Their current ISO 4548-12 efficiency claims on their website are probably valid, as I doubt Fram is going to put themselves in false advertising legal trouble. I'd think the same would hold true for any big brand name filter maker, but seems there is a blatant mis-match between Purolator's website claim on the Boss and the official spec sheet. As far as the M+H spec sheets, IIRC someone asked if they were up to date and the answer was yes ... but who really knows. If M+H is giving out info on outdated spec sheets, then that's a bad way to operating too.
Fram Endurance vs Purolator Boss oil filters
- Thread starter Scott S
- Start date
In which I presented a counter opinion.
I do? Who came up w/ "Ruffles" on the constant bypass leaf spring on Fram's lately? That was funny by the way.
Like I said, Purolator needs to clean up those statements better. But, Fram has done it too unfortunately.
It was the beginning of the downward spiral this board has seen... It would be nice to have a contact for us here still.
Last edited:
Look familiar? ... "LLLeaf Springs Have "RRRidges"I do? Who came up w/ "Ruffles" on the constant bypass leaf spring on Fram's lately? That was funny by the way.
BTW - the term "rock catcher" has been used on this site for at least 15 years, probably longer.
On a side note - even though not an official efficiency test, I'd like to see BR test some filters like the Microgard Select, Carquest Premium, NAPA made by Premium Guard, etc filters that don't have a leaf spring to see how they rank. Are you reading this BR? 
- Joined
- Sep 1, 2024
- Messages
- 730
As Ascent stated, filters wouldn’t have passed on to an efficiency test after failing a bubble point test. He had to fiddle with one to continue. He put a cork in the Fram. Bypass not checked for leaks on Frams due their construction.
So now the dilemma is maybe leak springs don’t affect efficiency after all, as the filter is assembled for the Fram efficiency test.
I go by the 2024 Puro website data. “Youse” can do as you want.
.
So now the dilemma is maybe leak springs don’t affect efficiency after all, as the filter is assembled for the Fram efficiency test.
I go by the 2024 Puro website data. “Youse” can do as you want.
.
Or maybe the leaf springs in those with a metal-to-meal" seal were flat and smooth like they should be to get any kind of a seal between two metal parts without a gasket of some kind.
I agree.
Just a thought but maybe these defective/failed filter product lines could be collected in a "Do Not Buy These Oil Filters" sticky with can date stamps etc (so if its redesigned maybe the list can be updated).
What good is the efficiency #s if we are dealing with a defective/failed filter to begin with.
REFERENCE
Motorcraft FL820, FL500s (media rips)
Fram Endurance (defective leaf spring)
ETC
Just a thought but maybe these defective/failed filter product lines could be collected in a "Do Not Buy These Oil Filters" sticky with can date stamps etc (so if its redesigned maybe the list can be updated).
What good is the efficiency #s if we are dealing with a defective/failed filter to begin with.
REFERENCE
Motorcraft FL820, FL500s (media rips)
Fram Endurance (defective leaf spring)
ETC
It’s easier to inspect a filter for bad louvres. The faulty leaf spring gap is impossible to screen for. I’d rather look for the bad louvres and reject a bad sample. M&H for me until Champion addresses the issue. Frequent air filter changes and oil changes I guess. Old school cellulose or hybrid filter media seem to filter finer.
A test from 2021 is of questionable applicability when filter designs change overnight with cost cutting and ownership changes.
And efficiency is not everything if it impairs oil flow.
A test from 2021 is of questionable applicability when filter designs change overnight with cost cutting and ownership changes.
And efficiency is not everything if it impairs oil flow.
Last edited:
- Joined
- Jul 29, 2022
- Messages
- 164
Been trying to find this thread again. I just wanna say I was definitely told misinformation. Did some research and it seems all of Mann and Hummel filters have gotten worse with tearing as well as louver issues being closed in a lot of them.
Been trying to find out if I should use the microgard select and Carquest premium (both made the exact same) or the fram synthetic endurance. Since finding out that information and also seeing my purolator boss with a lot of closed louvers when I cut the filter open and took it apart I have completely stopped using them.
Unfortunately the Endurance has it’s own QC problems at this time. The Carquest Premium and Microgard Select are currently looking great.
- Joined
- Jul 29, 2022
- Messages
- 164
Yes. About a month ago.
- Joined
- Jul 29, 2022
- Messages
- 164
That’s unfortunate. guessing similar issues?
Endurance has been consistently showing a leaking bypass leaf spring in c&p’s. Bad stamping.
I know I'm just keeping the snowball rolling, but aren't OEM Honda filters made by Fram?
The RTA version is made in Japan, not sure which company makes it…
- Joined
- Jan 7, 2024
- Messages
- 262
The Boss is far from a rock catcher.
Similar threads
