Do you hear that? That little sigh that's coming from your engine bay? That's your radiator asking for Mishimoto Liquid Chill™ Synthetic Engine Coolant. Formulated to operate flawlessly under extreme conditions and with both gasoline and diesel, Liquid Chill will help your engine warm up quickly and maintain ideal operating temperatures.Liquid Chill™ Synthetic Engine Coolant technology combines an inherently nontoxic propylene glycol base with unique poly organic additives (POAT) to allow a service life that can exceed 7+ years or 750,000 miles in Heavy Duty (diesel) applications and over 2+ years or 250,000 miles in Light Duty (gasoline) applications, although Mishimoto engineers recommend consulting your service manual for application-specific guidelines. Liquid Chill™ Synthetic.