I can't even fathom 20k mi oil filter interval... that would be like 3 years for me...
Just hit 84k today, bought car in late Jan '14 with 70k.
Originally Posted By: AccordK24
Before Honda switched over to the maintenance minder system, their official recommendation on their 4-cylinder cars was to change the oil filter every other OCI. Back then, they spec'd 10,000 mile OCIs for their 4-cylinder engines, so that means the oil filter would be in operation for 20k miles.
I'm sure there are many owners/dealerships who did actually follow this recommendation, and it doesn't seem to have hurt the reliability of their 4-cylinder engines.
I read on another forum some time ago that Honda did actually test their oil filters extensively, and they found that the filters were still very serviceable after 20,000 miles. That's supposedly the reasoning behind their recommendation to change the filter every other OCI.
Here's a Honda 15400-PLM-A01 that I cut apart. It served for a 7.5k OCI in a CR-V and looks like it could have easily done another OCI.
Link
So, while it's probably not something I'd personally do since oil filters are cheap, I doubt it would cause harm to follow their recommendation of changing the filter at every other OCI.