For emergencies, Diesel Recovery (DRC) can quickly dissolve gelled fuel and thaw frozen filters so drivers aren’t stranded.  This feature explains how vital coolant is to engine health — not just for temperature control, but for preventing corrosion, scaling, cavitation and sludge. Many coolant‑related failures happen because coolant is forgotten due to long service intervals. The article highlights how older IAT green coolants can break down quickly and cause deposits, while OAT and HOAT technologies offer longer‑lasting, cleaner protection. AMSOIL coolants provide excellent freeze/boil protection, long service life, and compatibility with all coolant colors and system materials. They also eliminate the need for SCAs in heavy‑duty use, reducing risks of additive dropout and sludge.