I put the wrong fuel in my car. Help!?

E- 85 won't hurt your car. It is 1 part ethanol and 9 parts gas. If you put another 4 gallons of gas in the ethanol content is even lower. To be safe you might want to keep filling up as you drive to add more gas in there. It will probably run a little lean and you will notice less power, but you won't hurt the car at all. It is continuous use that would degrade rubber seals, etc.

I would fill it up all the way with regular gas, and try to drive as much as possible to burn through that tank as fast as possible.

High concentrations of Ethanol may eat through the lines and other seals, but usually only prolonged exposure (time not necessarily volume).

One tank shouldn't be bad if you can get through it quickly, and not let it sit in the system, plus diluted with the remaining 4gallons of regular is really E-50 or so.

with E-85 I would check with dealer they may have you drain your fuel tank it is a blend of 15% gasoline and 85% denatured fuel ethanol not 1 to 9 like was stated in a answer above

I put ethanol into my car and It only runs on regular petrol . I could tell no difference at all . Now diesel that's an iffy .

Nothing will happen but if youdont feel conferable continue useing the gas you usally use but nothing will happen you can buy an injector fluid cleaner $5 or less

If i were you, i would consult your manual for the customer service number for Saturn. Who would know what the best course of action but the people who made the car?