[Normy]

Prestone. Make sure you use distilled water!

Really, you should change your coolant about every other year. I recently changed mine; I had been using Prestone Lo-Tox, which is based upon propylene glycol instead of ethylene glycol, but I can't find this stuff any more, so I installed the regular stuff. A good flush of the system is a good idea, and while you are in there (WYAIT), you should change your thermostat and probably ought to go ahead and change out your coolant hoses too if they have been there a while. 928's look terrible parked on the side of the road, hood up....and a puddle of green fluid underneath.

Good luck-

N