Last 7 years I've switched over to Zerex G-05, have had no issues using it in the DD's or the toys...clear in color, no sticky residue, works great with RedLine Water Wetter, I've seen a constant 20 degree drop in my wingcar running it 50/50 along with 8-10 oz. of Redline water wetter.

and winter running conditions greatly improved in the DD's over the Green Prestone used in the past which were on the verge of overnight radiator freezes when we had some extreme temp drops/windchill

Have had no corrosion or deposit build ups in the cooling systems either running the Zerex, whereas I'd see some occasional scum build up in the radiators running Prestone "green" in the past

mike