Classic. His test, like the oil tests, is for show/entertainment only/is worthless on how these products perform in your car. So....BITOG BE LIKE....
View attachment 196131
The way project farm tests air filters seems very relevant.
Constant speed dirt accumulation like say how I drive 80% of my miles on the highway then occasionally floor it to pass some slow poke or merge on the highway. Truck collects dirt at around 100cfm or less then occasionally needs nearly 400cfm.
The surge test where the k&n let a bunch of dirt and the paper filters didn't seems relevant.
What happens to oil at cold temperature some how seems relevant, probably want to avoid the ones that are so thick they haven't even started the race and the other oils are finished if it gets cold where you live.
What happens to cold oil after it's been cooked for a bit seems relevant.
For me it's 110f in the summer and -10f in the winter. In my truck I'll change the oil once a year or less so what happens to baked oil, kinda relevant for me.
All I have to do is avoid the baked ones that wouldn't move in the cold.
The only thing remotely like his wear scar test in an engine is the contact between a flat tappet lifter and cam, yeah only 90s cars and trucks and small engines run flat tappets. Doesn't apply to most engines these days. Even my 1984 big block Chevy has a roller cam after I rebuilt it.
I have a filter minder installed on my pickup and with about 3,000 miles on the air filter it has yet to trip the 10'' h2o resistance indicator. Whatever I'm giving up to run a better paper air filter isn't even costing me 10'' of h2o at 5,000rpm which I'm sure my truck spends less than 0.1% of it's run time even above 4,000rpm.
So the benefits of more air less than 1% of the time aren't worth up to 10x more dirt going into the engine all the time.