I'd say replace the oil pressure sender, and the temp gauge sender. Since its a 95 the temp gauge sender is located on the *** end of the block, under the wiring from the injectors with about 5mm of space to play with. (You get two senders with the 93-95 zj's, one is in the water outlet tube where the thermostat is, and is for the computer. The other is right in front of the firewall towards the back of the block. Removal is easy if you have a 1/4 ratchet and the right socket break off plastic bit and unscrew the copper plug, but installation is a PITA.)
Normal range for the oil sender I'd say is 40-70 when cold, then 20-45 when warm. It will climb when you hit the gas, and fall when you idle. If its all over the place replacement is a 5 minute procedure, the oil pressure sender costs about 30 from NAPA or 15 bucks from rockauto.
If a week goes by without needing to replace something, pinch me because I must be dreaming.