Types of antifreeze

An antifreeze mixture is used to achieve freezing-point depression for cold environments and also achieves boiling-point elevation (anti-boil) to allow higher coolant temperature. Freezing and boiling points are colligative properties of a solution, which depend on the concentration of the dissolved substance. These are the traditional type of anti-freeze most commonly used in North America.

Their silicate and phosphate composition provides protection for aluminium and bare iron surfaces. The different types of antifreeze include ethylene glycol and propylene glycol, which are prominently used as car engine coolants. Less popular antifreeze agents are methanol and propandiol and glycerol. Toyota, Volkswagen, and Audi all use their own formulas that happen to be dyed pink. Honda uses a dark green dye.

OAT coolants have longer service lives than IAT coolants, needing to be flushed every years or 150miles. Much like engine oils, the differences between different coolant types is a bit of a mystery for most drivers. At most, knowing one has the green stuff, some others have pink, blue, or red stuff is about as far as it goes — and that includes most real car geeks as well. This article will help answer these questions and more. Engine coolant, also known as antifreeze , is mixed with water to keep the radiator from freezing in extreme cold and overheating in extreme heat.

There are many different types of coolant, so it’s important to know what variety is right for your car or truck. Prestone believes you can retrofit to its organic acid orange almost any vehicle with an aluminum radiator and cooling system that has been well-maintained and is in good condition, if you do it right. H owever, the antifreeze maker recognizes the possibility of a problem with Dodge truck 5. All antifreeze falls under one of three basic types.

We will give you a brief understanding of each and why they are not compatible with each other. Different colored antifreeze is used to identify the type of antifreeze being used. Organic Acid Technology (OAT) antifreeze is orange, re green, pink or blue.

Extended Life Coolant (ELC) does not require a supplement. The Different Colors of Coolant.

Coolant lowers the freeze point of the coolant in your radiator to protect it from freezing, even in the worst winter conditions. Coolant in the summer time works as an anti-boil and protects the system components from corrosion, which is a big deal especially with aluminum components. The dyes are added by manufacturers to try to align each type of coolant in the right category, unfortunately there’s no rigid set of rules guiding this process, so always read the label. Newer coolants such as Prestone, based solely on the OAT chemical make-up, now offer a 10-year or 15000-mile change interval thanks to their superior corrosion protection.

Prestone is yellow, but many other coolant manufacturers use different colours. In addition, completely flush and refill the system every two years or 20miles, whichever comes first. The color in antifreeze is like food coloring.

Prestone has always used fluorescent yellow, Texaco and Shell have always used green. Because most modern engines use aluminum cylinder heads, they require the protective, anticorrosive properties of antifreeze. When water freezes, it expands, so without the flui this expansion can cause your engine block to crack and ruin your motor.

At best, mixing types of antifreeze will cause the lifespan of the new mixture to degrade to that of the one with the shorter service interval. Dex-Cool is the antifreeze recommended by General Motors, the company that makes Chevys,. This is the traditional antifreeze , based on its green color. These hybrid extended-life coolants can be used on.

Hybrid Extended-Life Coolants. TOThere are basically two types of coolant in the world. Ask a Parts Professional for assistance. B type, color and application. Antifreeze Reference Chart.

This is still the predominant color of antifreeze used. This antifreeze lasts an average of 40K miles. The biggest thing to look out for is using the organic acid technology (OAT) in older vehicles with brass or copper radiators. OAT antifreeze is designed to be used.

For the purpose of consistency, we will use the term coolant when describing an engine heat transfer fluid. RV antifreeze is non-toxic and meant for pumping into the plumbing system. Automotive antifreeze is a whole different critter. Many types are toxic, and should only be put into an engine cooling system.

AFGPs evolved separately in notothenioids and northern cod.

In notothenioids, the AFGP gene arose from an ancestral trypsinogen-like serine protease gene. Type I AFP is found in winter flounder, longhorn sculpin and shorthorn sculpin. The two most common types of antifreeze are proteins and ethylene glycol.

The proteins simply undo the formation of ice crystals by breaking them down as they try to form. Ethylene glycol, on the other han reduces the temperature at which liquids can freeze, thus preventing the ice from ever trying to crystallize. Traditional coolants (often green or yellow) generally use silicates, while new style (generally orange or pink) coolants use organic acids. Which types form sludge when different types of coolant are mixed? For all makes, all models and all colors of antifreeze.

Red antifreeze contains organic acids that protect engine parts from corrosion. Silicate (green) type antifreeze does not mix with red type antifreeze. Never mix the two colors in a cooling system. The organic acids in red type will cause precipitation of silicates in.

Your VW coolant expansion tank will usually have the coolant spec marked on the tank. Your owners manual will also specify the VW coolant spec and will usually list a part number. In the beginning, machine coolants consisted of simple oils applied with brushes to lubricate the machine tool.

As cutting operations became more severe, machine coolant formulations became more complex. These types of coolant are made up of different compounds other than glycol, along with different protection additives from those found in regular green antifreeze. That is why most extended-life coolants are dyed colors such as re gold and pink.

Both ethylene glycol (EG) and propylene glycol (PG) are used as the antifreeze base. From here the additional additives and inhibitors are added. Each glycol has supporters, although the best choice depends on the intended use.