I used low end to mid range oil filters in my 21 years old 370k miles LS400 since 1998-1999, the FCI was/is once a year, the OCI was/is 7-10k/6mo with conventional and 14-20k/12mo with syn. The engine consumes 1/2 quarts every 3-4k since new, I added 1/2 quarts with conventional oil at 3-4k then change at 6 month. I added a total about 1.5-2.0 quarts with synthetic oil and change at 1 year.
The low end filters were Fram Extra Guard, Purolator Classic, STP and some house brands such as Pep Boys or O'Reilly. Mid range filters were Bosch Premium, Motorcraft, Purolator Pure 1 ...
If the engine is still running well after 370k miles with cheap filters for up to 20k miles, is it idiocy for using bottom of barrel filters for 2 OCI's up to 10k miles each ?