Does it hurt your 3.1 Liter 6 cylinder engine in 1995 Oldmobile Cutlass to put 93 Octane Gas it?

No, using 93 octane gasoline in a 1995 Oldsmobile Cutlass with a 3.1L V6 engine will not hurt it. Higher-octane fuel is simply more resistant to pre-ignition (knocking). Your engine's computer is designed to adjust to the higher octane; it won't cause damage. The worst that will happen is you'll be paying more for fuel without a noticeable performance increase. Your engine is designed to run optimally on the recommended octane (check your owner's manual), but it won't be harmed by using a higher grade.