I agree with what you said.

I think it might be possible that the oil pump moves too much oil at higher RPMs. (As in, a lower flow of oil would be more than sufficient to lubricate the engine at higher RPMs without the danger of running the pan dry).

Someone could put an oil level sensor into their pan to see if the level drops significantly at higher RPMs to confirm this problem.

Regarding the K&N filter having better filtration than the Motorcraft filter, I've recently come across information that says OE filters, like Motorcraft, are designed to last longer by not filtering as well as aftermarket filters do (so that the filter can operate longer before getting plugged up and going into bypass).

If true, this would indicate that the "oil filter study" is WRONG and the Motorcraft filters do not use the Purolator Pure One element (he made this determination by a purple dye on the element seam that also happened to be found on the Pure One filter).

Brian


Quote:
Originally posted by Dan Nixon:
This info does argue that the filter they were using (presumably Motorcraft but who knows) presumably does flow well enough but I am not sure the case is closed on that either.