Geo 1995 Prizm Owner's Manual page 207

When
to
Add Oil
If the oil is at or below the "L," you'll need to add some
oil. But you must use the right kind. This part explains
what kind of oil to use. For crankcase capacity, see
"Capacities and Specifications" in the Index.
1
NOTICE:
Don't add too much oil. If your engine has so
much oil that the oil level gets above the upper
mark that shows the proper operating range,
your engine could be damaged.
Just fill it enough to put the level somewhere in the
proper operating range. Push the dipstick all the way
back in when you're through.
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