JEndsley

MC 820S ​​
the OE supplier for the 820S is and has been for decades Champion Laboratories. They make for many different labels. I worked there for many years. Saw thousands of MC filters of this p/n and others go down the lines. They invented the anti drainback valve used by MC. Due to competition, they do not supply the aftermarket version of this particular part, but they do some other MC parts. They also make the Mobil1 filter which I run occasionally when I want a premium filter. It has a microglass media, a heavier can, etc. I have also found it at Walmart now for about $10 give or take by location and p/n I am sure. Just my 2 cents

redfishtd

I don't have the time to waste cutting filters open .After fords continuing spark plug problem my faith is rattled .Not to mention all the failures in the timing chain area .
ok I will swap to napa filters ,bad pleats and dirt getting to these parts oh no!
I went to champion plugs and missed further problems since they are in their third design change .

Smokin04

Best filter for mod-motor family: It has NO bypass at all. 100% filtration all the time.
http://jomarperformance.com/catalog/index.php?cPath=53


Then run one of these:
http://www.filtermag.com/


ZERO chance of dirt or metal washing through your motor.

SCORGE

filter mag.....that's cool

PerryB

I like the filter magnet. As far as the no bypass filter, I think it's a mis-understood concept by many, and the seller is cashing in on it. Unless the OEM type filters are being run WAY too long and getting plugged, they are operating in full flow mode. The internal bypass is designed so if the filter were to become significantly plugged, it opens and allows the engine to continue to get oil, albeit unfiltered. If that happened with the non-bypass filter you'd be spinning bearings. This is in no way related to a bypass oil filter found on big trucks and heavy equipment.

Smokin04

Perry, respectfully, that isn't entirely true. Bypass filters are affected by more than just dirt. And most commercial oil filters are NOT full flow filters by design. The filter I listed is a full flow racing filter with no bypass whereas the 820S was never intended nor designed to be a "full flow" filter. The bypass serves two functions. One: when the oil is cold and too thick to pass quickly/efficiently through the filter media, the bypass opens to prevent oil starvation...especially during start-up where the most damage occurs. Two: IF the filter gets clogged the bypass opens as to not starve the engine of oil. However, if your filter ever gets clogged it's likely due to catastrophic engine failure any way (or you're just a terrible vehicle maintainer). This is also a big deal if the engine was designed on a certain oil viscosity. IE 30/40/50wt oil running through a filter designed for 20wt oil. https://mobiloil.com/en/article/car-...-how-they-work For a "racing equivalent" for our filter the CM-6731-FL820 is the way to go. Here's a link to a case of them:
https://www.summitracing.com/parts/fms-m-6731-fl820

650NutKase

Provide your proof. What makes this a 'fact' as you say? 100% filtration at what microns?? If that's the case, it's better than any oil filter that has ever been made.

PerryB

I love a good technical discussion. With a well articulated argument such as yours, I'm happy to have my ideas challenged. My understanding is that a typical production filter is designed to open it's bypass when the pressure differential across the media is about 20 psi. It would be very interesting to equip an engine with a gauge on either side of the filter housing and see what's actually happening.

redfishtd

On my massey ferg by dealer recommended. Transmissions on the f150 have
donut mag in pan from the factory.
This should not be this expensive to add. Any reasonable fittable magnet would do along with some tie wraps .