There's nothing special about antifreeze...it's just a solute (spelling?). Anything dissovled it water will lower the freezing point and elevate the boiling point. Ethylene glycol is used because it's mostly compatible and non-corrosive with the metals, rubber seals/hoses, gaskets, etc. used in engines. You could use sugar or salt...but I doubt your cooling system would last. 80/20 sounds like too much solute (why does that sound wrong?...it's late) and not enough solvent. At what point does it become too much? Not sure...


2000 Mitsubishi Montero Endeavor, "Katsumi", 138k
1993 Toyota Tercel, backup vehicle, 93k
1989 Isuzu Trooper, "Beniko", R.I.P. at 233k

My 'Genuine Isuzu Parts' decals - for sale