Fyi, I too use a car filter on my B&S 21hp engine on my JD mower, a Purolator PL10241, which has same threads & pressure bypass psi. I just remove the filter & pour out the fluid in it & replace it every oil change. These filters are good for 10k miles on a car so 10 hrs a year is nothing.
So where did you find the bypass pressure psi information?
My concern with the 3614 is exactly what repairman54 is bringing up. A low power oil pump pushing through a restrictive automotive filter. Surely the B & S engineers picked a filter media and bypass type for a reason, right?