When I recently bought my 07 Toyota Tacoma, and the salesman (not very experienced or knowledgeable, been with them a couple of months) was giving me the "use our service department" pitch, he said. "well if you do your own service work (I do) at least buy the oil filters from us. They have a special feature that distinguishes them from others" He was not very specific about the "feature" but I gathered it had something to do with a check valve design of sorts.
Can anyone shed light on how real this special feature is.
Frank