Coolants

[STUART_BRENNAN@HP-Andover-om3.om.hp.com]

     Since I'm getting close to pulling the radiator for some work, I was 
     wondering about coolants.
     
     I was planning on refilling the system with the same old Prestone, and 
     distilled water.  A friend mentioned that GM now uses some sort of 
     orange coolant that is supposed to have longer life, and perhaps other 
     good properties, too.  Does anyone know anything about the orange 
     stuff, and if it might be better/worse/no difference for Tigers?
     
     Stu