Where G40 is required, it’s surely the best fit. So, G30 won’t be the perfect equivalent in this place. Despite being in the same coolant variant, the coolant characteristics might vary.
So, can I use g40 coolant instead of g30? Fortunately, G30, G33, G34, G40, and G44 are all compatible with each other, so G40 coolant can be used instead Of G30.
In this blog post, we’ll also explore the properties of both types of coolant and answer the question of whether G40 coolant can replace G30. Let’s dive in!
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Can I Use G40 Coolant Instead Of G30? Is G40 a G30 Coolant Equivalent?
Yes, G40 engine coolant can generally be used to replace G30 coolant. But this requires a brief discussion to clear up the answer. And I can’t really say, G40 is literally the G30 equivalent. Here’s why.
Like going from G30 to G40, G40 represents an improvement over the previous G30 generation of coolants. G40 uses newer organic acid technology (OAT) that lasts longer and offers better corrosion protection. It is when you’re comparing this with G30’s hybrid organic acid technology (HOAT).
Major antifreeze/coolant manufacturers state that G40 is backward compatible and can be mixed with or used to replace previous generations, including G30.
However, you’ll need to be a little careful. While G40 is compatible as a top-up, it’s ideal to completely flush the old G30 coolant and replace it entirely with G40 to realize the full benefits. Mixing dilutes the improved additives.
Check Manufacturer Specs If available, verify the cooling system specifications in your vehicle owner’s manual. Most modern vehicles today recommend G40, but older models may still specify G30 or other grades.
What is the Difference Between G30 and G40 Coolant?
Before knowing further information, let’s check a G30 vs G40 debate, in a nutshell.
| Property/Specification | G30 Coolant | G40 Coolant |
|---|---|---|
| Primary Use | Older vehicles | Modern vehicles |
| Service Life | 2-3 years or 30,000-50,000 miles | Up to 5 years or 150,000 miles |
| Cost | Affordable | More expensive |
| Boiling Point | 223°F (106°C) | 347°F (175°C) |
| Freezing Point | -34°F (-37°C) | -53°F (-47°C) |
| Heat Transfer Properties | Good | Good |
| Corrosion Protection | Good, but may not be as effective as newer coolant formulations | Excellent |
| Compatibility with Aluminum | Good | Excellent |
| Color | Green or blue | Red or pink |
| Base Type | Ethylene glycol | Ethylene glycol |
| pH Level | 8.5-10.5 | 7.5-10.5 |
| Corrosion Inhibitors | Inorganic additives | Organic acid technology (OAT) |
| Silicate-Free | No | Yes |
| Nitrite-Free | No | Yes |
| Amine-Free | No | Yes |
| Phosphate-Free | No | Yes |
Note: Keep in mind that the properties and technical specifications may vary depending on the specific brand and formulation of the coolant.
Let’s have a look at the properties with a short description.
Properties of G40 Coolant
G40 coolant, also known as G40 Extended Life Coolant (ELC), is a type of antifreeze/coolant used in modern vehicles. It is an ethylene glycol-based coolant that has been formulated to provide extended service life and protection to aluminum engine parts.
One of the primary benefits of G40 coolant is its extended service life, which can last up to 5 years or 150,000 miles, whichever comes first. This is due to the presence of organic acid technology (OAT) in the formulation, which helps to reduce corrosion and maintain the coolant’s effectiveness over a longer period of time.
G40 coolant is also known for its excellent performance in high-temperature environments. It has a high boiling point and a low freezing point, which makes it ideal for use in extreme weather conditions.
Additionally, G40 coolant has good heat transfer properties, which help to dissipate heat from the engine and prevent overheating.
Another key property of G40 coolant is its compatibility with aluminum engine parts. It contains additives that help to protect aluminum components from corrosion and prevent the formation of deposits and scale.
Overall, G40 coolant is a high-performance coolant that offers extended service life, excellent temperature control, and compatibility with aluminum engine parts. However, it is important to always check your vehicle’s owner’s manual to ensure that G40 coolant.
Properties of G30 Coolant
G30 coolant is a type of antifreeze/coolant that is commonly used in older vehicles. It is an ethylene glycol-based coolant that contains inorganic additives to provide protection against corrosion and scale buildup.
One of the primary benefits of G30 coolant is its affordability. It is a cost-effective option for older vehicles that do not require the extended service life of newer coolants.
G30 coolant also has good heat transfer properties, which help to dissipate heat from the engine and prevent overheating. It has a high boiling point and a low freezing point, which makes it suitable for use in a wide range of temperatures.
Another key property of G30 coolant is its compatibility with a variety of different types of engine materials. It contains additives that help to protect engine components from corrosion, including aluminum, brass, and copper.
However, G30 coolant does have some drawbacks. It has a shorter service life than newer coolant formulations, typically around 2-3 years or 30,000-50,000 miles. Additionally, it may not provide the same level of protection against corrosion and scale buildup as newer coolant types.
Overall, G30 coolant is a cost-effective option for older vehicles that do not require the extended service life of newer coolants. However, it is important to always check your vehicle’s owner’s manual to ensure that the G30 coolant is compatible with your specific make and model.
Can I Mix G30 And G40 Coolant?
While you can use g40 instead of g30, it’s generally not recommended to mix different types of engine coolant, including G40 and G30. Because they have different chemical compositions and could potentially result in damage to your engine or cooling system.
G40 and G30 coolants have different properties and are specifically formulated for different types of engines.
G40 coolant is typically used in newer vehicles and is designed to provide longer-lasting protection against rust and corrosion, while G30 coolant is typically used in older vehicles and is designed to be more compatible with older engine materials.
If you mix G40 and G30 coolant, it could potentially result in the coolant losing its properties and becoming less effective in providing protection against rust and corrosion.
Additionally, mixing different types of coolant could result in the formation of sludge or other deposits that could clog your cooling system and cause overheating or other issues.
How to switch from G30 to G40 coolant? 4 Steps Explained
When it comes to switching from G30 to G40 coolant, there are some important steps to follow to ensure a safe and effective transition. Here are the steps to consider:
1. Check the compatibility of the new coolant with the engine and cooling system
Before switching to G40 coolant, it’s essential to make sure that it’s compatible with the engine and cooling system. Check the manufacturer’s recommendations and consult with a qualified mechanic or the coolant supplier to ensure that the new coolant is suitable.
2. Drain the old coolant
To switch to G40 coolant, you’ll need to drain the old G30 coolant completely. Make sure that the engine is cool before you start the process. To drain the coolant, locate the radiator drain plug or remove the lower radiator hose. Make sure to catch and dispose of the old coolant safely.
3. Flush the cooling system
Once the old coolant is drained, flush the cooling system with clean water. This step is important to remove any remaining traces of the old coolant and debris that may have accumulated in the system. Run water through the system until it runs clear.
4. Fill the cooling system with G40 coolant
After flushing the cooling system, fill it with the new G40 coolant. Follow the manufacturer’s instructions for the correct dilution ratio and fill level. It’s essential not to overfill the system.
Run the engine: Start the engine and run it for a few minutes to circulate the new coolant. Check for leaks and monitor the engine’s temperature to make sure it’s operating within the recommended range.
When switching coolant types, there are some things to keep in mind to ensure a successful transition. These include:
- Make sure to use the recommended coolant type: Different engines require different types of coolants, and using the wrong type can cause damage to the engine or cooling system.
- Don’t mix coolants: Mixing different types of coolants can cause chemical reactions that may damage the engine or cooling system. Always use the same type of coolant and avoid mixing different brands or types.
- Follow the recommended change interval: Coolant should be changed at regular intervals, as recommended by the manufacturer. Following this schedule will help keep the engine and cooling system in good condition.
- Dispose of old coolant safely: Coolant is toxic and harmful to the environment, so it’s essential to dispose of it safely. Check with your local waste management facility for guidelines on how to dispose of coolant properly.
By following these steps and keeping these tips in mind, you can safely and effectively switch from G30 to G40 coolant, ensuring optimal engine performance and longevity.
Here is some more info in this video on coolant change in cars –
FAQ’s
Q: Can I use G40 and G30 both in my Porsche?
Yes, you can. But give priority to the car manual recomendation.
Q: Do I need to dilute Xstream G40?
Yes, Xstream G40 needs to be diluted with deionised water as per the recommendations in the vehicle handbook. It is important to follow the guidelines for safe and effective use of the product. In case of minor spills, use oil absorbent granules, sand or dirt and wash the spillage site with soapy water and dry it.
Q: Is G40 coolant for diesels?
Yes, G40 coolant is suitable for use in diesel engines, including heavy-duty diesel applications. It is designed to meet or exceed standard industry requirements for both light-duty and heavy-duty diesel engines, as well as automotive applications.
Bottom Line
So, based on the information available, it appears that G40 coolant can be used as a substitute for G30 coolant, as both types of coolant are designed for universal use and meet standard industry requirements for automotive applications.
However, it is always best to check the manufacturer’s recommendations for your specific vehicle to ensure that you are using the correct type of coolant.
