Fill out your profile. We have no idea what motor you have.
Probably a sender problem. On the 4.0 the oil pressure releif valve is set at 75 psi according to the Jeep factory service manual. Very doubtful the actual oil pressure is 65 psi warmed up at idle. Unless you are using gear oil in your crank case!
Ban computer updates and autoplay video! Boycott music without real instruments and singers using autotune.