01/22/2026
Since the cold weather is coming let’s talk coolant.
Coolant isn’t just colored water — each color represents a specific chemical formula, lifespan, and level of engine protection. Knowing the right one keeps your engine cool, clean, and corrosion-free.
What Coolant Does:
• Regulates engine temperature
• Prevents freezing in winter & overheating in summer
• Protects internal parts from corrosion, rust, and scale buildup
Coolant Color Guide
Green – IAT Coolant
• Traditional formula
• Contains silicate corrosion inhibitors
• Used in older vehicles (pre-2000)
Orange – OAT Coolant
• Organic Acid Technology
• Long life: 5+ years
• Common in GM and some European cars
Yellow/Gold – HOAT Coolant
• Hybrid Organic Acid Technology
• Excellent, long-lasting corrosion protection
• Used in modern American & Asian vehicles
Pink/Purple – OEM-Specific Coolant
• Used in Toyota, VW, Audi
• Designed to prevent metal reaction inside the cooling system
Blue – OEM Asian/European Coolant
• Found in Honda, Subaru, BMW
• Very stable in both cold and high-heat conditions
Warning:
Never mix coolant types!
Mixing can cause sludge, corrosion, overheating, or water pump failure.
Always match the coolant recommended in your owner’s manual.