Anti-freeze that is compatible with aluminium engines.
Dexcool
Autozone/ advanced auto usually has antifreeze that goes with either kind. I suggest that.
Any type of antifreeze will work in a 99 Saturn SL1. Many people recommend using Prestone Antifreeze for cars that are older than ten years.
The 1997 Saturn used dexcool antifreeze. The chemical compounds are different and should never be mixed, as the engine will no longer cool properly.
Dexcool don't use any other type
No vehicle actually burns antifreeze. If the antifreeze level in your Saturn seems to be going down, it's because of a leak.Possible antifreeze leak locations are:Coolant hoses.Radiator cap.Water pump.Heater core.Head gasket.Cracked head or block.Find out where the leak is occurring and repair it.
Dex-cool
To change the antifreeze on a 2003 Saturn Ion-3, locate the drain plug on the bottom of the radiator. Drain the liquid into a pan before refilling it.
if its clear its water and needs to be removed and replaced with Antifreeze. You can get pre-diluted or strait antifreeze which you must dilute yourself 50/50. The kind needed is in your car manual or on the resivoir cap the way those buckets are set up it will look clear sometimes
Use the Gold antifreeze. It lasts longer and does not cause corrosion to the cooling system.
Match the color of your antifreeze to the new one you buy unless it states its good for all types.
Phosphate free antifreeze