have 95 jeep grand cherokee laredo 5.2mpi leaking oil out the bottom when started cant find were its coming from observed that oil presure gage moves around alot

you might check the oil filter.as for the oil gauge it could be a pump issue or again the filter.good luck

Mine idles at i think 20psi then driving down the road 40psi then 60psi when I get on it.

the REAR MAIN SEAL is a very common leak, but they don't really leak a whole lot. how bad is the leak, is it leaving puddles or a couple drops?

If it's leaking alot and leaving puddle, along with your oil pressure fluctuation, could also be the Oil Pressure switch on the back of the engine (center) next to the Distributor.