actually the ford ones that arent the ones that coem on the new cars are actually made by someone else, i think its champion labs
and fram is the worst, they suck and dont have a proper anti drainback valve
my engine is pretty clean, ive been through it soooo many times and rountinely run cleaners such as seafoam through it.....
my oil does get dirty after an oil change, it jsut takes awhile.....
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