I use castrol syntec 0w-30 german blend and a s2k filter on my 98 spec b18c. I have two oil pressure gauges, one in the cabin thats electric and one under the hood thats mechanical.

I get about 17 psi @ idle and a max of 70 psi + or - 5 above 4k. Tests show that this oil is closer to a 40w when its at operaing temperature. I was wondering if my oil pressure is too low and if i should switch to a smaller filter or different oil. I really like the castrol german blend as it sems to stay cleaner longer and does really well in all the oil analysis tests i have seen. Also i burn no oil and the engine has roughly 60k on it comp and leakdown tell me that the engine is really healthy.

 

Also forgot to add the 17psi @ idle and 70psi above 4k rpm are at operating temp. At startup i get from 60-80 psi.