Chevrolet 1993 S-10 Pickup Owner's Manual page 259

KO704
What Kind of Oil to
Use;
Look for three things:
SG
"SG" must be on the oil container, either by itself
or combined with
other quality designations, such as "SG/CC," "SG/CD,"
"SF, SG, CC",
etc. These letters show American Petroleum Institute (API) levels
of
quality.
NOTICE
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