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That makes sense. I had easily accepted his explanation in part because the owner's manual for our 2009 Honda says to change the oil filter every other oil change and I assumed that was why. Between that video and the AAP customer service December interaction apparently I was operating on a...

First, thank you for the very thorough explanation, with actual test data no less! I know his personality isn't universally liked but I recall a video the Motor Oil Geek did a while back where he claims Donaldson advised leaving oil filters installed longer because their efficiency improves as...

My goal is to save time and minimize the number of times the engine has to reprime the lube system so I’ve been changing the oil more often than the filter. If the Carquest EP oil filter is changed by 15,000 miles (instead of the 20,000 it’s rated,) would that be likely to bring its filtering...

It appears you are correct. I reached out to them again asking about the Carquest EP oil filters and this time they said they are “rated at 99–99.5% efficiency at 25 microns.” They also confirmed the Carquest premium oil filter is rated “99.5% efficiency at 20 microns.”

Advance Auto Parts customer service informed me of the below via text on Dec. 3rd: Carquest EP Oil Filter P/Ns P84356 & P84047 are both rated 99.5% efficiency at 20 microns The Carquest oil filters appear to be built differently than the Premium Guard Ultimate Synthetic Oil Filters (I had sent...