What is the difference between green and orange antifreeze?
Although both the green and orange antifreeze are ethylene glycol-based, the difference between them is that they contain different corrosion inhibitor ingredients or additives. While orange antifreezecontains organic acids, green antifreeze has additives, such as silicates, borates and phosphates.
The color of healthy engine coolant is green (for ethylene glycol) or orange (for Dexcool). A rusty color indicates that the rust inhibitor in the coolant has broken down and it can no longer control rust and scale buildup.
- Ten years after General Motors began using Dex-Cool as an antifreeze in most of its cars and light trucks, GM car and truck owners continue to complain that the coolant corrodes and clogs radiators and radiator caps, erodes water pumps, rots radiator hoses, causes chronic overheating and engine damage while leading to
- Newer coolants such as Prestone, based solely on the OAT chemical make-up, now offer a 10-year or 150,000-mile change interval thanks to their superior corrosion protection. Prestone is yellow, but many other coolant manufacturers use different colours.
- Prestone is guaranteed for all cars and can be mixed with any other colour of coolant/antifreeze, making it the best choice for you. You can use it to top up your car or to refill the cooling system after you've drained and flushed it.
Antifreeze, also known as coolant, is a bright yellow or green liquid that mixes with the water in cars, trucks and other vehicles to keep the radiators from freezing or overheating. Made from either ethylene glycol or propylene glycol, antifreeze and coolant change the freezing and boiling points of water.
- OAT coolants are currently easily available from most auto parts stores. Hybrid Organic Acid Technology or HOAT: This coolant is usually dyed yellow but comes in other colors like green, pink, blue, red and orange, which leads to a lot of confusion.
- The cost of a coolant flush typically runs between $100 and $150, according to highly rated mechanics. Kauffeld says this can include four gallons of coolant, a conditioner and a cleaner. CostHelper.com estimates the cost between $54 and $144 for a radiator flush at a standard shop, with an average price of $99.
- Rather than open the cap on the radiator, just check to see whether the liquid reaches the “Full” line on the side of the coolant reservoir shown here. It's part of the coolant recovery system. If the liquid doesn't reach the “Full” line, open the bottle and add a 50/50 mix of water and coolant until it does.
Updated: 28th November 2019