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you are never going to get the pressures you say you need, the pump just is not large enough. that is why that type of filter is sized to the engine not the other way around as you are doing.

if you have a turbo engine, 10 psi may be ok for idle, but certainly not for driving. the piston coolers turn on only above 15 psi, and you want at least twice that for driving. if i drove only 4000 miles a year, i would only change the oil every 3 years.