Filling Your Tank - Oldsmobile cutlass supreme 1996 Owner's Manual

Filling Your Tank The cap. is behind a hinged door on the left side of
your vehicle.
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A
CAUTION:
Gasoline vapor is highly flammable. It burns
violently, and that can cause very bad injuries.
Don't smoke if you're near gasoline or refueling
your vehicle. Keep sparks, flames, and smoking
materials away from gasoline.
While refueling, hang the
cap inside the fuel door.
To take off the cap, turn it slowly to the left
(counterclockwise).