chances are you need a new head gasket, or some other seal
where is located the oil pressure switch for 94 geo prizm
May have to change oil.
The oil capacity on a 1996 Geo Prizm is approximately 5 quarts. The recommended oil type is 10 W 30.
5W30
Every 5.000 miles
I would recommend 5w-30
4 quarts
75-90 weight gear oil
1.6 liter holds three quarts with a filter change.
http://www.ehow.com/video_11_change-motor-oil.html this helped me HUGE!!!
3.9 Quarts in a 1996 SD with a filter change. 3.7 if you don't change filter.
A 1992 Geo Prizm typically requires about 4 quarts (approximately 3.8 liters) of oil when using an oil filter change. It's important to check the owner's manual for the specific engine type, as the capacity may vary slightly based on the engine configuration. Always ensure to use the recommended oil type for optimal performance.