The only kind of coolant I run in my quad. If you're looking for coolant you and feel making a difference in the way your quad performs, I highly recommend Liquid Performance Ice Water Racing Coolant.
Liquid Performance Ice Water Non-Glycol Racing Coolant is a water-based coolant designed for racing engines of all types. This innovative product contains no glycols or polyglycols or phosphates making it an environmentally-friendly product. Liquid Performance Ice Water Racing Coolant contains a broad spectrum corrosion inhibitor package and is premixed with pure deionized water for protection against ferrous and non-ferrous degradation and corrosion. Proprietary ingredients are designed to provide maximum heat transfer in the most extreme temperatures and operating conditions allowing for greater horsepower without overheating.