VW Volkswagen Original G13 Coolant Audi (Succesor Of G12++)

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If you are unsure about which type of coolant to use, it is always best to consult your owner’s manual or a qualified mechanic for advice. By using the correct coolant for your vehicle, you can ensure that your engine is protected and running smoothly.

The corrosion inhibitors make up the bulk of the various chemicals within the coolant. The four main types all use different compositions, giving them different properties suited to different cooling systems. It provides optimum anti-freeze, overheating and corrosion protection. Its special composition raises the water’s boiling point to 135C (275F) while preventing evaporation, and lowers the freezing point to -40C (-40F) while maintaining a constant pH value.One of the key features of G40 coolant is that it is free of silicates. Silicates are chemicals that are commonly found in other types of engine coolant, but can potentially cause corrosion or other issues in certain types of engines.

OATs, HOATs, and Si-OATs, am I right? I know that sounds confusing, but you don't need to know the chemical makeup of every fluid in your car; that's an engineer's job. What you do need to know is which coolants can be used together. Carrying around spare fluids is a nice thought, but not everyone has the space for them, so knowing which coolant types that can top off your system in a pinch can save your cooling system. Coolant as we know it today, also called antifreeze, is a kind of “super water.” Within it are many chemical compounds, the most important being Glycol. When added to water, Glycol raises the boiling point and lowers the freezing point, stabilizing it for use in almost every application while also containing the lubricants that help the water pump and thermostat function effortlessly. The rest of the chemicals are corrosion inhibitors and dyes (orange, green, red, or blue). The corrosion inhibitors are critical to the type of material that the engine is made from and are categorized into four different types. Engine Coolant Corrosion Inhibitors: The manufacturer’s recommendation is based on the specific requirements and characteristics of the engine, and using the recommended coolant can help ensure proper engine performance and longevity. How to switch from G40 to G13 coolant? Step By Step Technically, you can mix G40 coolant with G13 coolant in an emergency situation. However, it is not recommended to do so for several reasons. You should also remove the thermostat and flush the system with clean water to remove any remaining traces of the old coolant. Step-2: Choosing the correct coolantOver the last three decades or so, Mercedes has used three different coolant variants in their gasoline and diesel-powered cars. The oldest is Q1030002, a Yellow or Gold-colored G05 HOAT formula that is no longer available through Mercedes. It may still be available in small quantities through manufacturers like Zerex, but Mercedes recommends you drain and refill with a more modern variant.