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I did a investigation on some filters..I cut some apart to see what the guts look like and the Frams are some of the lowest quality filters out there. They do not contain anti-drainback valves


Of all the Fram's I've disected(at least a dozen) they have had a anti-drain back device. it's right at the front(screw on end) usually black in color, but have found an occasional blue one. please check your facts before bashing a product.
as for filter material I have seen little differance btwn the valvoline, napa(silverline), and fram.........Karl