Welcome- low oil pressure is a bit like a heart attack waiting to happen, and you must take it seriously. You don't mention how many miles are on your Z, but oil pressure obviously increases as revs increase. The only way to know for sure would be to remove your oil pressure sending unit at the block and insert a known manual pressure gauge to check for problems. Together with a CONSULT 3 unit, you can verify whether there's truly a problem.
Unless you have the tools on hand to do all this, there's not much else a DIYer can do. Where are you located? Maybe there's other members on this board who can help.