where is located the oil pressure switch for 94 geo prizm
I would recommend 5w-30
The oil capacity on a 1996 Geo Prizm is approximately 5 quarts. The recommended oil type is 10 W 30.
Every 5.000 miles
May have to change oil.
http://www.ehow.com/video_11_change-motor-oil.html this helped me HUGE!!!
75-90 weight gear oil
1.6 liter holds three quarts with a filter change.
chances are you need a new head gasket, or some other seal
It is generally 10W-30 but can depend on your ambient temperature. At colder temperatures you need thinner oil. You should be able to find this information in your owner's manual and it is also stamped on the oil filler cap if it is the original.