Outer Limits 4x4 Board

My 89 NF is getting old i think ..only done 190k but when engine is cold the oil pressure sits just under 2 (goes to 8) cant remember the units but im sure you all know. When it warms up it goes to 0 ..... ???

does seem very sluggish down low ....... any suggestions ?

Hmmm just one thing the Paj oil pressure senders do go awol so I'd get the oil pressure checked by a mechanic first.
If your getting zero oil pressure after warm up don't drive it until you can get it checked. Hopefully it's just the sender unit (about $80 from Mitsu) and needs a good tune

Mine was reading just about 0 , got it tested, 90 was the result, so don't believe the factory gauge necessarily