When maintaining your car, there’s a lot to think about. If you’re doing a coolant flush or replacing the radiator, you’ll want to make sure you’re using the right kind.
With so many options, how do you know which one to choose? It’s a good idea to figure out – what is HOAT coolant and how is it different from OAT?
In this guide, I will look at the properties of coolant that provide so much value. I’ll also take a look at the HOAT variation and see if it’s the right choice for your vehicle.
What is HOAT Coolant?
HOAT signifies Hybrid Organic Acid Technology, or Hybrid OAT. It is a hybrid of OAT (Organic Acid Technology) and IAT (Inorganic Acid Technology). Typically, HOAT is yellow, but it can also be purple, blue, pink, or turquoise.
HOAT Coolant has added silicates for increased corrosion corrosion protection of aluminum parts. Being adopted by a wide range of automotive manufacturers, it is more common to find it in newer cars.
HOAT coolant intervals can reach 100,000 miles or 5 years, whichever comes first. This is generally longer than other coolants.
HOAT antifreeze may also be labeled as G-05, G-11, G-12, and Global. Always check your vehicle’s owner’s manual to determine what coolant is required.
You may find HOAT coolant in many OEM vehicles, including but not limited to: Volkswagen, Ford, Volvo, Mercedes Benz, Audi, KIA, Hyundai, Nissan, Honda, and Toyota.
What Does Coolant Do?
Coolants contain a variety of alcohols such as mono ethylene glycol, or mono propylene glycol. The latter is a chemical agent that is synthetic, has no color, no odor, and no flavor.
It is the predominant ingredient in many prevalent coolants, in addition to being applied to other industrial products. It has been assessed to be the safest of the alcohols, and is considered non-toxic.
This class of alcohol has a boiling point near 370 degrees Fahrenheit and a freezing point near -74 degrees.
On to mono ethylene glycol, this is another alcohol used in some coolants. It is also colorless, but it has a sweet odor and flavor. And it is extremely toxic. This alcohol has a freezing point of 8 degrees Fahrenheit, while its boiling point is around 400 degrees Fahrenheit.
These alcohol solutions mixed with water in recommended ratios, raises the freezing and boiling points of the engine coolant.
A proper ratio of antifreeze and water will not only keep the cooling system fluids from freezing in freezing temperatures, but will also absorb heat generated from the motor to avoid overheating. As with other liquids it also minimizes corrosion.
The function of HOAT Coolant
The primary role of HOAT coolant, as with any type of coolant, is to cool the car engine.
This solution will flow through the engine passages, absorbing heat (energy) produced by the engine. It must be able to perform effectively at several engine temperatures.
HOAT is hybrid in nature, meaning it will help minimize rust and protect against corrosion.
HOAT will work well both high and low temperatures and will also have a significantly longer service life than other coolant choices, providing a service time of approximately five years or 100,000 miles before it begins to degrade.
Although HOAT is a superior choice when compared to IAT, it does not offer the same amount of protection when compared with OAT. However, the HOAT is still superior than both in terms of protection.
Some manufacturers may suggest that you use some kind of specialty additive in the system when using HOAT. These additives will commonly have silicates, phosphates, nitrates, or molybdates in them.
Adding some kind of additive every 25,000 miles may also be necessary in order to continue getting the best protection out of the solution, and you should not mix HOAT with IAT or OAT.
HOAT is a mixture of two; however, they still would not recommend adding anything more, to assure some of the unique qualities are not affected.
Differences Between OAT vs. HOAT Coolant
#1. Color.
One of the most noticeable distinctions between these two types of coolant is their color. HOAT typically appears yellow, but it can also be found in shades like purple, blue, pink, or turquoise.
In contrast, OAT coolant predominantly comes in orange. Meanwhile, IAT coolant usually presents itself as green.
#2. Lifespan.
HOAT coolants are known for their impressive longevity; they can go up to five years or 100,000 miles before requiring a change.
On the other hand, OAT coolants have an even longer lifespan that extends to ten years or 150,000 miles.
HOAT has a shorter duration because it contains IAT components that need replacing every two years or after 30,000 miles. Despite its reduced lifespan, HOAT offers excellent protection against corrosion.
#3. Price.
Both HOAT and OAT coolants typically carry a higher price tag compared to IAT coolants. However, among the two options, HOAT tends to be more affordable.
You can expect to pay around $30 per gallon for HOAT coolant while OAT generally ranges from $50 to $65 per gallon.
For those looking for better deals on either type of coolant, shopping online may offer savings—even if you have to wait a little longer for delivery.
Just remember to avoid sellers with prices that seem too good to be true; using inferior fluids could lead to significant issues with your vehicle later on.
How to Find the Right Coolant for Your Car?
Drivers used to select coolant based on color alone. But given that many types of coolants use different colors, this is not a good way to choose your coolant. You want to rely on concrete information instead.
Please read the label when you buy your coolant to ensure that you’ve selected the right kind.
If you do not know what coolant your car uses, refer to the owner’s manual. It will tell you precisely what fluids to use regarding your regular maintenance.
If you don’t have the owner’s manual, you might be able to find a pdf file online. You also might be able to call your local dealership to get that information.
The owner’s manual is going to recommend a formula that is OEM, but you can usually find an equivalent aftermarket version if you prefer.
Is Hoat coolant the best?
Hoat coolant is a high-quality coolant that protects your engine better than standard green or yellow coolants. It contains extra additives that resist steel and aluminum corrosion while further assisting to protect your engine from overheating.
Overall, Hoat coolants are great for protecting your engine and improving engine longevity, but you should always use the coolant specified by your car manufacturer to avoid problems.
Can Oat and Hoat coolant be mixed?
No, HOAT coolants are not compatible with OAT or NOAT coolants, and nor should any mix be attempted, although HOAT is classified as a hybrid mix of OAT and IAT coolant. By mixing these you may lose some of the beneficial properties of HOAT.
What happens if you mix Hoat and OAT coolant?
Mixing HOAT cooler, OAT cooler can lead to many undesired results. For example a slushie-like consistency occurs that may damage your engine. HOAT and OAT cooler are not compatible and should not be mixed.
Does it matter what brand of coolant I use?
Yes. Different coolant brands use different compositions and properties. Otherwise, if you choose a coolant if your engine that follow the specification from your vehicle manufacture it should work, though different brands have superior properties and quality.