umm if it was me i would just replace the motor that gasket is way to expensive to have replaced it costs like (10.00) so i would just replace the motor!!!!!
chances are you need a new head gasket, or some other seal
where is located the oil pressure switch for 94 geo prizm
First try snugging up the oil pan bolts but if that doesn't work you'll have to change the oil pan gasket.
The oil capacity on a 1996 Geo Prizm is approximately 5 quarts. The recommended oil type is 10 W 30.
5W30
its the PCV valve
valve cover gasket
Every 5.000 miles
You need a head gasket.
4 quarts
I would recommend 5w-30
I would suspect that is a Valve Cover gasket leaking.