Antifreezes & Coolants

Check your vehicle owner's manual for the required coolant chemistry (IAT, OAT, HOAT, or silicon-based) and concentration; choose a product that matches that specification and is compatible with your engine materials and seals

Use pre-mixed coolant for convenience and the correct freeze/boil protection, or mix concentrated coolant with distilled water to the manufacturer-recommended ratio (commonly 50/50) for target freeze and boil protection and corrosion inhibition

Replacement intervals depend on coolant type and vehicle: conventional IAT often needs changing every 2 years, while many OAT/HOAT or specialty coolants extend to 5 years or more; follow your vehicle manufacturer recommendations and monitor for contamination or reduced performance

Mixing different coolant chemistries (IAT, OAT, HOAT) or incompatible formulations can reduce corrosion protection and shorten service life; only mix if the product labels and your vehicle documentation explicitly state compatibility

Watch for engine overheating, low coolant level with recurring loss, discolored or oily coolant, sweet smell from the engine bay, or coolant leaks; any of these warrant inspection and possible cooling-system service

Specialty coolants like long-life OAT/HOAT formulas, low-silicate or phosphate-free, and dry or non-water-based coolants are used for specific engines, high-performance applications, or to avoid deposit issues; select them when your vehicle manual or service advisor specifies them

Store coolant in its original, labeled container out of reach of children and pets and away from extreme temperatures; dispose of used coolant at a local hazardous-waste or recycling facility following local regulations because it is toxic and should not be poured down drains