Try [unleaded] 87 octane. If it does not "ping" excessively you should be OK
If it does "ping" try 89 Octane
It should be the same as my '94 SC2 which is 12.8 gallons.
12
The fuel pump for the 2001 Saturn SC1 is in the gas tank
The gas tank on a 2002 Saturn SC1 has a capacity of approximately 12.0 gallons (45.4 liters). This size allows for a decent driving range, depending on the vehicle's fuel efficiency.
The gas tank of a 2002 Saturn SC1 has a capacity of approximately 13.2 gallons. This size allows for a decent range before needing to refuel, depending on driving conditions and fuel efficiency. Always refer to the owner's manual for the most accurate specifications.
Trouble code P0404 means:Exhaust gas recirculation circuit range/performance
10 gallons
Approx. 11.5 gal.
in the gas tank
Near 12.8 gallons
"gas mileage generally goes from 25-28 mpg in the city to 34-40 mpg on the highway" - http://www.cargurus.com/Cars/Overview/-c5816-1995-S-Series.html
The vehicle PROBABLY has a sticking injector. Try a little injector cleaner in the next take of fuel. If that doesn't help, there may be more serious problems.