Originally Posted by littlehulkster
I have a Mazda and was astonished at how small these are, but honestly, I'm kind of over it now.
The fact is, these are the spec filter for a lot of cars....
As you should be, and true that. Nissan specs the 6607 on most of their vehicles and has for some time. As noted, quick lubes and indies use the 6607 in place of the 7317 as SOP, and those are jobber tier filters being used.
This anecdote proves nothing to the contrary about using it here. Mazda specs this size, and Fram warrants the FU/XG series to 20k miles. Common sense says between the two of those, they'd have a clue about their useful life, holding capacity. That said, the 7317 is logical upsize if one desires a tad bigger/longer filter with similar specs.