An analysis of oil filters that you can find published on the web disects the filters in filtration ability, by pass valve, and anti-drain back valve. If you are looking for a top shelf filter, for a better priced then these are the options, available at a chain parts store.
Purolator PL10241 $6
Purolator PL25230 $7.50
Mobil1 M1-102 $11
Bosch 3330 ?
A couple of responses re. Zanotti . Do either of you guys have an address for them? Six dollars is a whole lot better than $15.00. I wouldn't even be asking if I got em' for that price.
Thanks !!
I think he's saying he buys 6 (six) at a time, not that he pays $6 per filter. That ain't happening anywhere for an HD filter....