18 gallons
In the gas tank.
inside gas tank,remove tank.
You have to put it in the overflow tank.
In the fuel tank.
It is inside the fuel tank.
16.5 gallons
you will have to drop your gas tank its inside the tank drive safe
the battery is under the window wash tank
According to http://consumerguideauto.howstuffworks.com/1990-to-1997-oldsmobile-cutlass-supreme-4.htm, the fuel capacity for the 1994 Cutlass Supreme is 16.5 gallons. Many years ago I owned a 1968 Cutlass Supreme convertible--a very fun car.
Look under the vehicle along the frame follow the fuel line from tank
If it is anything like my 93, the fuel pump is on the top of the gas tank.
What is the fuel tank capacity of an Oldsmobile Alero