How are you getting the oil to the filter? Just sucking good oil off the top of a jug or pouring into a barrel filter?
FWIW, I just settle in the sun and suck good off the top and run through a water trap fuel filter. Only done one water test in 8 years and it didn't crackle too bad so I never changed my method. I also run a water trap filter on the truck, I figure if it gets past 2 filters it must my lucky day to sit on the side of the road.....