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Picking the right antifreeze for your Infiniti G37 matters because the cooling system protects the engine from freezing, overheating, and internal corrosion. Using the wrong formulation or neglecting coolant maintenance can reduce heater performance, shorten component life, and lead to expensive repairs. This guide covers seven shortlisted antifreezes chosen for compatibility and key performance traits. We assessed freeze and boil protection, corrosion inhibitors, and long-term stability to help you pick a coolant that matches the needs of the G37. Read on for the factors we prioritized and clear guidance before you start service.
Looking for other parts? See all Infiniti G37 parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | Zerex Asian Vehicle Blue 50/50 Prediluted Antifreeze/Coolant (1 gal) |  |
| Most Popular A crowd favorite that many people choose with confidence | Valvoline Zerex Dex-Cool Concentrate Antifreeze/Coolant, 1 Gallon |  |
| Best Quality Built to a higher standard if you want something more solid | BMW Genuine Antifreeze/Coolant (Concentrate) |  |
| Best Budget The cheapest option that still gets the job done reliably | PEAK DEX-Cool Antifreeze + Coolant Concentrate for GM Vehicles, 1 Gallon |  |
| Most Sold A high-volume bestseller chosen again and again | Honda Genuine Type 2 Extended-Life Antifreeze/Coolant, 50/50 Pre‑Diluted, 1 Gallon |  |
| Best Value for Money The sweet spot between price and what you get | PEAK OET Extended Life Orange 50/50 Prediluted Antifreeze/Coolant, 1 Gal |  |
| Best Overall The best all-around choice for most situations | Genuine 00272 SLLC2 Engine Coolant / Antifreeze |  |
1. Zerex Asian Vehicle Blue 50/50 Prediluted Antifreeze/Coolant (1 gal)
| Formula | HOAT (Hybrid Organic Acid Technology) |
|---|---|
| Mix | 50/50 Prediluted Ready-to-Use |
| Chemistry exclusions | Silicate-free, Borate-free, no amines or nitrites |
| Intended vehicles | Asian makes such as Infiniti, Honda, Nissan, Hyundai, KIA |
Zerex Asian Vehicle Blue is a ready-to-use, 50/50 prediluted antifreeze designed for Asian makes and fits the cooling requirements of the Infiniti G37 when a blue, silicate- and borate-free HOAT formula is specified. You pour it straight into the coolant reservoir or radiator during a top-off or after a full system flush without needing to mix concentrate. The formula includes phosphate corrosion inhibitors to protect aluminum radiators, water pumps, and other metal components common on the G37 and is engineered to resist scale and deposits over long service intervals. Being factory-formula compatible makes it a practical replacement for scheduled coolant changes and reduces worry about chemical mismatch. The main limitation is that it is specifically the blue HOAT chemistry, so it must only be used where the G37 owner’s manual calls for that type; it is not a universal coolant for all Infiniti model years or coolant chemistries. Also, prediluted fluids occupy more storage volume than concentrates if you like to keep spare supply on hand.
Best for: Reliability-focused buyers who prioritize using the chemistry recommended for their Infiniti G37 to minimize corrosion and long-term cooling-system problems.
Less Ideal for: Drivers who need a universal coolant for multiple makes with differing chemistries or who prefer to store concentrated fluid for longer-term spares.
- Prediluted 50/50 formula ready to use with no mixing required.
- HOAT chemistry formulated without silicates or borates for compatibility with Asian-manufacturer specs.
- Phosphate additive helps protect aluminum radiators, water pumps, and other cooling-system metals.
- Available in a one-gallon container suitable for a full coolant service or multiple top-offs.
- Only appropriate where the Infiniti G37 requires a blue HOAT, so it is not suitable if a different coolant chemistry is specified.
- Prediluted product takes more storage space than concentrate if you want to keep extras on hand.
Verdict A factory-compatible, ready-to-use blue HOAT coolant that’s a dependable choice for Infiniti G37 owners when that chemistry is called for.
2. Valvoline Zerex Dex-Cool Concentrate Antifreeze/Coolant, 1 Gallon
| Brand | Valvoline |
|---|---|
| Model | Dex-Cool |
| Form | Concentrate |
| Volume | 1 gallon |
Valvoline Zerex Dex-Cool concentrate is a factory-quality orange OAT antifreeze formulated to protect cooling systems from corrosion, scale, freezing and boiling. It is intended to be mixed with clean tap or distilled water at common ratios (50/50, 60/40, 70/30) and used for either topping off the reservoir or doing a full system flush. The formula is silicate and phosphate-free and avoids amines, borates, nitrates and nitrites, which helps reduce deposits and extends service life in systems that specify Dex-Cool chemistry. Practical benefits include strong aluminum protection and a long service interval, which means fewer coolant changes over ownership. Important limitations: this is a concentrate that requires correct mixing before use, and it is formulated specifically as an OAT Dex-Cool product so it should only be used where the vehicle manufacturer permits that chemistry. For an Infiniti G37, confirm the factory coolant specification before swapping to ensure chemical compatibility with the existing coolant in the system.
Best for: Convenience-driven buyers who prioritize a widely available, manufacturer-type coolant that minimizes maintenance frequency and simplifies top-offs and flushes for routine care.
Less Ideal for: Drivers who prefer pre-mixed, maintenance-free coolant solutions or those whose vehicle requires a different coolant chemistry should consider alternatives.
- Designed to meet Dex‑Cool OAT specifications for vehicles that require orange coolant
- Concentrate format allows mixing to exact ratios for seasonal protection
- Silicate and phosphate free formula reduces risk of deposits and protects aluminum components
- Long-lasting formulation reduces frequency of coolant changes
- Requires correct dilution before use rather than ready-to-use convenience
- Not appropriate for systems that require non‑OAT or different chemistry coolants
Verdict A durable, manufacturer-aligned Dex‑Cool concentrate ideal for Infiniti G37 owners who want a long‑lasting, service-reducing coolant as long as the vehicle calls for Dex‑Cool chemistry.
3. BMW Genuine Antifreeze/Coolant (Concentrate)
| Part Number | 82141467704 |
|---|---|
| Concentrated | Dilution required |
| Manufacturer | BMW |
| Contains | No nitrates or phosphates |
This is BMW genuine concentrated antifreeze designed to match factory specifications for BMW cooling systems. It is used as a concentrate that you mix with distilled water to achieve the correct coolant ratio, and it contains no nitrates or phosphates to reduce deposit formation. For performance-oriented drivers this coolant maintains consistent operating temperatures and is formulated to behave like the fluid the vehicle was built for, which helps protect aluminum components and the broader cooling circuit. The bottle includes a bittering agent to discourage accidental ingestion and the blue fluid is the traditional BMW color for quick visual confirmation. Important limitations are that it is sold as a concentrate so you must mix it accurately and you should confirm compatibility and correct dilution for your specific vehicle; it is also a single-brand OEM fluid, so drivers who prefer universal or long-life aftermarket formulas may want alternatives. Overall it delivers the confidence of a factory-quality coolant when used as instructed.
Best for: Performance-oriented buyers who prioritize factory-spec fluids and predictable thermal performance for demanding driving and precise maintenance.
Less Ideal for: Buyers seeking a universal aftermarket coolant with extended service intervals or a ready-to-use premixed product should consider other options.
- Factory-quality formula matched to manufacturer specifications
- Concentrated for precise dilution and control over freeze/boil protection
- No nitrates or phosphates to reduce scale and deposit formation
- Bittering agent added for safety and easy visual confirmation with blue color
- Requires correct mixing with distilled water before use
- Single-brand OEM formulation may not match long-life aftermarket intervals
Verdict A factory-quality concentrated BMW coolant for drivers who want OEM-level thermal control, provided you mix it correctly.
4. PEAK DEX-Cool Antifreeze + Coolant Concentrate for GM Vehicles, 1 Gallon
| Vehicle fitment (listed) | GM vehicles 1995 and newer requiring orange OAT coolant |
|---|---|
| Service life claim | Up to 10 years/150,000 miles with flush and fill |
| Standards met | ASTM D3306, D4985, GMW3420, GM6277M |
This PEAK DEX-Cool concentrated antifreeze is a factory-style organic acid technology coolant intended to be mixed 50/50 with distilled water before use. It is designed to protect cooling system metals, including aluminum, against rust and corrosion and meets relevant ASTM and GM performance specs. In practice you mix the concentrate to the correct ratio, pour it into the radiator or fill the coolant reservoir, and the formula is built for long service intervals when the cooling system is flushed and filled. The product is free of amines, phosphate, borate, nitrite and silicate, which reduces deposit formation and helps maintain cooling passages. Practical benefits include extended life claims up to 10 years or 150,000 miles after a full flush and compatibility with vehicles that require orange OAT coolant. Limitations to note are that this is labeled for GM vehicles 1995 and newer so fitment for an Infiniti G37 is not the manufacturer recommendation and you must mix the concentrate correctly before use rather than pouring a ready-to-use premix.
Best for: Budget-conscious buyers who prioritize long service intervals and low per-gallon cost and are comfortable mixing concentrate themselves.
Less Ideal for: Buyers who want a ready-to-use premix or those who need a coolant explicitly specified by Infiniti for the G37 should consider a factory-replacement coolant instead.
- Concentrated formula lets you mix to a 50/50 coolant/water ratio for correct freeze and boil protection
- Claims extended service life up to 10 years or 150,000 miles after a complete flush and fill
- Formulated without amines, phosphate, borate, nitrite and silicate to reduce deposits
- Meets ASTM D3306, D4985 and GM performance specifications for OAT coolants
- Sold as a concentrate so requires correct measuring and mixing before use
- Marketed for GM vehicles which means compatibility with Infiniti G37 is not guaranteed by the manufacturer
Verdict A cost-conscious concentrated OAT coolant with long-life claims, but it is marketed for GM cars and must be mixed before use, so verify compatibility for an Infiniti G37 before installing.
5. Honda Genuine Type 2 Extended-Life Antifreeze/Coolant, 50/50 Pre‑Diluted, 1 Gallon
| Brand | Honda |
|---|---|
| Model | Type 2 Antifreeze/Coolant |
| Mixture | 50/50 pre-diluted |
| Service interval | Up to 5 years or 60,000 miles |
This is Honda's factory-formulated Type 2 antifreeze supplied pre-diluted 50/50 for immediate use. It is engineered with ethylene glycol chemistry and corrosion inhibitors aimed at protecting metal and non-metal cooling system components while providing freeze and boilover protection. Typical use is a drain-and-fill or top-up during scheduled coolant service where a long-life fluid is specified. Notable features include the blue long-life formula, OEM specification alignment, and a stated service interval up to 5 years or 60,000 miles under normal conditions. Practical benefits are straightforward installation since no mixing is required and consistent, factory-quality corrosion protection across the cooling system. Limitations include the product being a manufacturer-specific Type 2 formula, which may not match every vehicle maker's recommended coolant chemistry, and it contains ethylene glycol which requires careful handling and secure storage away from children and pets. Expect reliable, maintenance-friendly performance when the vehicle calls for this coolant type.
Best for: Risk-averse mainstream buyers who prioritize using manufacturer-recommended fluids and want a low-hassle, long-life coolant for routine maintenance on compatible vehicles.
Less Ideal for: Drivers who need a universal or different-chemistry coolant for non-compatible makes or who prefer propylene-glycol or non-toxic formulations.
- Factory-formulated, ready-to-use 50/50 mix requires no dilution before service
- Long-life chemistry rated for up to 5 years or 60,000 miles under normal conditions
- Specifically matched to manufacturer coolant formulation to reduce compatibility risk
- Corrosion and rust inhibitors protect both metal and non-metal cooling system parts
- Manufacturer-specific Type 2 formula may not be appropriate for non-compatible vehicles
- Contains ethylene glycol which is toxic and needs careful handling and disposal
Verdict A convenient, factory-matched long-life coolant for buyers who want the reassurance of manufacturer-specified fluid, but verify compatibility before using in non-Honda vehicles like the Infiniti G37.
6. PEAK OET Extended Life Orange 50/50 Prediluted Antifreeze/Coolant, 1 Gal
| Dilution | 50/50 prediluted |
|---|---|
| Intended region | North American vehicles |
| Volume | 1 gallon |
| Formula type | Extended life OAT |
This PEAK OET 50/50 prediluted coolant is an easy, budget-friendly option for routine coolant service or topping off the Infiniti G37. It is formulated as an orange organic acid technology (OAT) extended-life coolant intended for North American vehicles and is packaged ready to pour so you do not need to mix concentrate. In use it protects against rust and corrosion and simplifies maintenance during a flush and fill or a quick reservoir top-up. The bright color also helps spotting leaks. Limits to consider are compatibility specifics for some Japanese imports and manufacturer recommendations for the G37; always check your Infiniti’s coolant spec before switching. This product is aimed at straightforward maintenance rather than specialty performance applications, and it will not substitute for a coolant explicitly required by a dealer service specification if Nissan/Infiniti calls for a different formula.
Best for: Budget-conscious owners looking for a low-effort, ready-to-pour coolant for routine maintenance and top-offs who prioritize convenience and value.
Less Ideal for: Drivers who require dealer-specified Nissan/Infiniti factory-replacement coolant or who need a performance coolant for track or heavy-duty use should consider manufacturer-recommended alternatives.
- Ready-to-use 50/50 prediluted formula saves time and eliminates mixing errors
- Extended-life OAT formulation designed to reduce rust and corrosion during long service intervals
- Clear orange color makes leaks and fluid level checks easier
- Backed for use in North American Ford, Chrysler, and GM applications indicating broad automotive compatibility
- Not guaranteed to match every manufacturer coolant specification so confirm Infiniti G37 compatibility before use
- Prediluted product offers less flexibility if a custom dilution is required
Verdict A convenient, wallet-friendly prediluted extended-life coolant suited for routine G37 maintenance when the Infiniti coolant spec allows it.
7. Genuine 00272 SLLC2 Engine Coolant / Antifreeze
| Manufacturer Part Number | 00272SLLC2 |
|---|---|
| Brand | Genuine |
| ASIN | B0071N5DM4 |
This Genuine 00272 SLLC2 engine coolant is a factory-quality pink antifreeze sold as a single-quantity container and intended to maintain stable engine temperature and provide corrosion protection. It is typically used during routine coolant flushes or top-ups to restore the cooling system to the manufacturer-recommended specification. Notable features include a bittering agent to discourage ingestion and a formula trusted by vehicle manufacturers for consistent heat transfer and rust inhibition. In practice this coolant helps prevent overheating and reduces long-term corrosion when replaced on schedule, and the pourable container makes refills straightforward. The main limitation is that it is a brand-specific formula originally supplied for Toyota and Lexus applications, so confirming compatibility and proper service intervals for an Infiniti G37 is important before use. Some buyers also note the product costs more than generic alternatives, reflecting its factory-aligned formulation.
Best for: Balanced buyers who prioritize factory-quality fluids and predictable cooling-system protection and who maintain their vehicle on a regular service schedule.
Less Ideal for: Drivers seeking the cheapest aftermarket coolant or those who prefer a universal, vehicle-agnostic formula without checking model compatibility first.
- Factory-quality formulation designed to control engine temperature and inhibit corrosion
- Contains a bittering agent to discourage accidental ingestion
- Easy-to-pour single-quantity container suitable for routine coolant service
- Formulated for Toyota/Lexus applications which may limit direct fit guidance for Infiniti G37 owners
- Higher cost than many aftermarket coolants
Verdict A factory-quality Toyota/Lexus coolant offering reliable temperature control and corrosion protection, but check compatibility for the Infiniti G37 before choosing it.
Choosing the Right Infiniti G37 Antifreeze: Key Factors to Consider
Coolant Chemistry and Compatibility
The chemical family of the antifreeze determines which corrosion inhibitors it uses and how it interacts with seals, hoses, and metal surfaces. Organic acid technology, hybrid formulations, and traditional ethylene glycol-based products behave differently over time and may require specific service intervals.
Ensuring the coolant chemistry is compatible with the Infiniti G37's materials helps prevent premature seal failure, galvanic corrosion, and degraded heater core performance. Always check whether the antifreeze meets the vehicle manufacturer’s specifications or recommended inhibitor types before use.
Freeze and Boil Protection
Freeze point and boiling point protection define the coolant’s core function in cold and hot conditions. A coolant with a low freeze point prevents ice formation in the block and hoses during winter, while adequate boil protection maintains cooling efficiency under heavy load or high ambient temperatures.
Factor in your local climate when choosing a concentration. Some products come premixed for convenience, while concentrates allow you to adjust freeze and boil points by mixing to manufacturer-recommended ratios.
Corrosion Resistance for Mixed-Metal Systems
Vehicles like the Infiniti G37 use aluminum, steel, and other metals in the cooling circuit. Effective corrosion inhibitors protect these different metals from pitting, galvanic corrosion, and scale buildup that can restrict coolant flow.
Look for data on corrosion testing or formulations that specify protection for aluminum and mixed-metal assemblies. Longer-lasting inhibitors reduce the likelihood of localized corrosion and the need for early component replacement.
Service Life and Maintenance Interval
Different antifreeze formulas offer varying service lives, from shorter 2-year cycles to long-life options rated for many years or high mileages. The expected maintenance interval impacts total lifecycle cost and how often you will need to drain and refill the system.
Consider how long you plan to keep the car and your willingness to perform periodic coolant flushes. Long-life coolants can reduce maintenance frequency but may require full system service procedures when eventually replaced.
Additives and Seal Compatibility
Some antifreezes include additives intended to condition rubber seals and hoses or to boost pH buffering. While these can help prevent small leaks and extend component life, certain additive packages may not be compatible with older seals or aftermarket materials.
Confirm that the product does not adversely affect gaskets, O-rings, or plastic components in the G37 cooling system. If you encounter any swelling, hardening, or softening of seals after a coolant change, address it promptly to avoid leaks.
Ease of Use and Installation
Practical considerations such as whether a coolant is premixed or concentrated affect installation. Premixed products are ready to pour and reduce mixing errors, while concentrates let you control concentration to optimize freeze and boil points.
Also factor in how straightforward an antifreeze is to flush and fill during routine maintenance. Products that require special procedures or additives at service may add complexity for DIY owners and technicians.
FAQ
How often should I change the antifreeze in an Infiniti G37?
Frequency depends on the coolant type and manufacturer recommendations. Many modern long-life coolants are rated for multi-year intervals, while traditional formulations may require more frequent changes. Check the coolant label for service interval guidance and inspect the system periodically for discoloration, debris, or pH shifts that indicate a flush is needed.
Can I mix different types of antifreeze in my G37?
Mixing coolant chemistries is usually not recommended because incompatible inhibitors can reduce corrosion protection and shorten service life. If you must change types, it is best to perform a full system flush to remove the previous coolant and follow the new product’s dilution instructions.
What concentration should I use for winter protection?
The target concentration depends on the antifreeze formulation and local climate. A typical guideline is a 50/50 mix of concentrate and water for balanced freeze and boil protection, but colder climates may require higher concentrate ratios. Always follow the product’s mixing instructions and the vehicle manufacturer’s recommendations.
Does antifreeze also protect against overheating?
Yes. Antifreeze raises the boiling point of the coolant, which helps the system resist boiling during high-load or high-temperature conditions. Proper coolant concentration and a well-maintained cooling system with a functioning thermostat and radiator are all important to prevent overheating.
Is an antifreeze flush necessary when changing coolant type?
A flush is usually advised when switching coolant chemistries to remove residual inhibitors and contaminants. Flushing helps ensure the new formulation can work as intended and reduces the risk of reactions between old and new additives. Follow recommended procedures to avoid leaving contaminants in the system.
How We Chose the Best Infiniti G37 Antifreeze
We evaluated antifreezes using criteria that matter specifically for the Infiniti G37 cooling system. Primary filters included freeze and boil protection across expected climate ranges, and the chemistry type to confirm it matched recommended inhibitor families. Corrosion resistance for aluminum and mixed-metal engines was essential, since the G37 uses multiple metals in its cooling system. Long-term stability and recommended service intervals were considered to estimate how frequently coolant should be refreshed. Compatibility with OEM specifications and ease of use during routine maintenance, including whether the product is premixed or concentrated, were also weighed. We excluded coolants that lacked clear technical data on inhibitor type or corrosion testing, those with incompatible chemistries, and products that do not document performance in mixed-metal systems. The resulting shortlist focuses on options that meet the common technical and maintenance needs of Infiniti G37 owners.
Our full evaluation process is outlined in our review methodology.
Conclusion
Choosing the right coolant for an Infiniti G37 comes down to matching coolant chemistry to the vehicle’s materials, and selecting freeze and boil protection that fits your climate and driving patterns. Prioritize corrosion resistance for mixed-metal systems and consider service life to balance maintenance frequency against long-term protection. When changing coolant types, plan for a thorough flush and follow mixing recommendations to maintain inhibitor performance. Focusing on these key factors will help keep the G37 cooling system reliable and extend component life.
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