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Choosing the correct transmission fluid for your Infiniti G37 matters for shift quality, longevity, and repair avoidance. The wrong fluid can cause harsh shifting, premature wear, or erratic performance in different driving conditions. This guide covers the top shortlisted transmission fluids for the Infiniti G37, chosen for their chemistry, thermal stability, and friction characteristics. Below we explain the key criteria used to evaluate options and help you pick the fluid best suited to your driving style and maintenance goals.
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 | Honda DW-1 Automatic Transmission Fluid, 1 qt — Pack of 4 |  |
| Most Popular A crowd favorite that many people choose with confidence | Castrol Transmax DEX/MERC Automatic Transmission Fluid, 1 Gallon |  |
| Best Quality Built to a higher standard if you want something more solid | Nissan Genuine NS3 CVT Transmission Fluid (6 Quarts) |  |
| Best Budget The cheapest option that still gets the job done reliably | Nissan Matic-K Automatic Transmission Fluid (999MP-MTK00P), 1 Quart |  |
| Most Sold A high-volume bestseller chosen again and again | Valvoline MaxLife Multi-Vehicle Full Synthetic ATF, 1 Gallon |  |
| Best Value for Money The sweet spot between price and what you get | ACDelco DEXRON‑VI Automatic Transmission Fluid, 1 Gallon |  |
| Best Overall The best all-around choice for most situations | Valvoline MaxLife Multi-Vehicle Full Synthetic Automatic Transmission Fluid, 1 gal (case of 3) |  |
1. Honda DW-1 Automatic Transmission Fluid, 1 qt — Pack of 4
| Material | ATF |
|---|---|
| Liquid Volume | 128 Fluid Ounces |
| SAE J300 Viscosity Grade | 5W-40 |
| Number of Items | 4 |
This four-pack of Honda DW-1 ATF is genuine manufacturer transmission fluid packaged in one-quart bottles and intended for routine drain-and-fill service. It is typically used during scheduled transmission maintenance to restore proper fluid viscosity, lubrication, and hydraulic function that affect shift quality. Notable points include factory formulation and sealed single-quart bottles that are easy to store and pour with a funnel. Practical benefits are consistent shift feel and the reassurance of a factory-quality fluid when you want to avoid compatibility questions. Limitations are that DW-1 is a Honda-branded fluid and not specifically formulated or approved for every non-Honda automatic; for the Infiniti G37 you should confirm compatibility with the G37’s service requirements before use. The product also comes only in a multi-pack which is convenient for full service but less flexible if you need a single quart immediately.
Best for: Reliability-focused buyers who prioritize factory-quality fluids and want the reassurance of using a manufacturer-formulated ATF for scheduled maintenance on a known vehicle.
Less Ideal for: Buyers who need a fluid explicitly specified for the Infiniti G37 or who require a single quart at a time should consider fluids listed by Infiniti or single-bottle options instead.
- Genuine manufacturer formulation for predictable shift and lubrication performance
- Sealed one-quart bottles that are easy to store and pour
- Four-quart pack covers a typical drain-and-fill service without buying multiple single bottles
- Widely used by owners and technicians, with many reports of smoother shifting after change
- Not explicitly marketed for use in Infiniti G37 so compatibility must be confirmed against the G37 service spec
- Sold only as a multi-pack which may be overkill if you only need one quart
Verdict A trustworthy factory-formulation ATF in a four-quart pack that delivers predictable shift quality, but verify Infiniti G37 compatibility before choosing it.
2. Castrol Transmax DEX/MERC Automatic Transmission Fluid, 1 Gallon
| Liquid Volume | 128 Fluid Ounces |
|---|---|
| Viscosity | 4 to 6 cSt at 100°C |
| Upper Temperature Rating | 175 Degrees Celsius |
| Material | Molybdenum Disulfide Calcium Sulfonate |
Castrol Transmax DEX/MERC is a full-synthetic automatic transmission fluid intended to provide smooth shifting and protection in a wide range of transmissions. It is marketed as a multivehicle ATF with Castrol Smooth Drive Technology, which adjusts friction characteristics to help deliver consistent shift feel across different operating conditions. Typical use is a drain and fill or partial flush for transmissions that call for DEXRON/MERCON-type fluids; it is sold in a one-gallon bottle for workshop or at-home service. Notable features include high temperature oxidation resistance and additives to guard against copper corrosion and wear. The practical benefit is fewer inventory worries and a fluid that aims to behave like factory-quality ATF across many vehicles. Limitations include that this is a universal formulation rather than a vehicle-specific factory replacement, so for the Infiniti G37 you should confirm the factory-specified fluid requirement before switching, and full-system flushes may be needed to fully replace previous fluid in cooling lines and torque converters.
Best for: Convenience-driven buyers who prioritize one versatile fluid that covers many transmissions and simplifies maintenance and parts buying.
Less Ideal for: Owners seeking a strict factory-specified OEM replacement for the Infiniti G37 or those who follow manufacturer-prescribed brand-only fluids should consider Infiniti-recommended ATF instead.
- Full-synthetic formulation for improved high-temperature and oxidation resistance
- Formulated to control friction for smooth shifting across stepped and CVT-style systems
- Broad vehicle coverage reduces the need for multiple specialized fluids
- Universal formula may not match OEM-specified ATF chemistry for every vehicle
- Does not replace a complete factory-specified fluid match; some applications may still prefer manufacturer-branded fluid
Verdict A convenient, full-synthetic multivehicle ATF that simplifies maintenance but verify Infiniti G37 factory fluid specs before swapping.
3. Nissan Genuine NS3 CVT Transmission Fluid (6 Quarts)
| Material | Synthetic & Mineral Blend |
|---|---|
| Liquid Volume | 6 Quarts |
| Item Form | Liquid |
| Manufacturer Part Number | 999MP-CV0NS3-6PK |
This is Nissan Genuine NS3 CVT transmission fluid packaged as six quarts intended for CVT-equipped vehicles that call for the NS-3 specification. It is used for drain-and-fill or refill services to restore fluid condition and help maintain shift smoothness in continuously variable transmissions. The product is a synthetic and mineral blend engineered and labeled by Nissan for direct fitment to systems that require NS-3 fluid, which helps preserve valve body performance and clutch friction characteristics the transmission was designed around. Practical benefits include factory-spec formulation and convenient bottle packaging for home or shop service. Limitations are that it is a vehicle-specific CVT fluid so it should only be used where NS-3 compatibility is specified, and this pack requires careful handling to avoid leaks during shipping and pouring as some buyers have reported breached seals on individual bottles.
Best for: Performance-oriented owners who prioritize using factory-specified CVT fluid to maintain precise shift behavior and longevity in an Infiniti G37.
Less Ideal for: Drivers looking for a universal or high-mileage additive solution or anyone needing fluid for a non-NS3 transmission should consider alternatives.
- Factory-specified NS3 formula matches Nissan/Infiniti CVT requirements
- Sold in a multi-quart pack suitable for a full transmission service
- Blend formulation aimed at smooth shifts and durability in CVT systems
- Bottle packaging makes pouring and measuring easier for DIY or shop use
- Intended only for NS-3 compatible CVT units so not universal across transmissions
- Some shipments have had breached inner seals leading to minor leakage
Verdict If your Infiniti G37 requires NS-3 CVT fluid, this OEM Nissan NS3 6-quart pack delivers the factory-matched formulation for best shift quality and longevity.
4. Nissan Matic-K Automatic Transmission Fluid (999MP-MTK00P), 1 Quart
| Material | Synthetic |
|---|---|
| Liquid Volume | 1 Quarts |
| Brand | NISSAN |
| Model | 999MP-MTK00P |
This Nissan Matic-K transmission fluid is the factory-spec fluid intended for use where Matic-K is specified, and it is commonly used when topping off or changing the fluid in Infiniti G37 automatic transmissions that list Matic-K compatibility. It provides the smooth low-temperature shifting and stable hydraulic pressure the factory design expects, helping maintain shift quality in daily driving and during longer highway runs. The product comes in a 1 quart bottle, convenient for small top-offs or for mixing during a drain and refill service. Because it is the manufacturer-branded formula, it reduces uncertainty about spec compatibility compared with generic fluids. The limitation is volume and convenience if you need a full service fill since multiple quarts are required, and it is specific to Matic-K applications so it is not suitable for G37s that call for different fluid types such as CVT or other aftermarket specifications. Expect straightforward, factory-aligned performance when used for the correct Infiniti G37 automatic transmission application.
Best for: Practical, budget-conscious Infiniti G37 owners who prioritize using the factory-recommended fluid for routine maintenance and want a simple, no-surprises option for topping off or partial service.
Less Ideal for: Owners looking to do a full transmission flush in one container or those whose G37 requires a different transmission fluid specification should consider larger volumes or the correct fluid type instead.
- Factory-quality Matic-K formulation matched to Nissan/Infiniti recommendations
- Designed to support smooth low-temperature shifting and stable hot-weather pressure
- Sold in a single-quart bottle for easy top-offs and partial service use
- One-quart size means multiple bottles are needed for a complete fluid change
- Only appropriate where Matic-K is specified and not for CVT or other transmission types
Verdict A budget-friendly way for Infiniti G37 owners to use the factory Matic-K fluid for top-offs and partial service, but plan on buying multiple quarts for a full change.
5. Valvoline MaxLife Multi-Vehicle Full Synthetic ATF, 1 Gallon
| Material | Synthetic |
|---|---|
| Liquid Volume | 1 Gallons |
| Model | MaxLife Multi-Vehicle ATF |
| Flash Point | 394 Degrees Fahrenheit |
Valvoline MaxLife Multi-Vehicle ATF is a full synthetic transmission fluid built to work across many light-duty automatic and CVT applications. It is typically used for fluid changes or top-ups where a multi-application ATF is desired and includes additives aimed at reducing wear, preventing leaks, and improving thermal and viscosity stability. Notable features include formulation for many manufacturer specifications and frictional enhancements for smoother gear engagements. For an Infiniti G37 this fluid can be a practical option when the owner needs a reliable, factory-quality replacement that meets common Dexron and manufacturer-listed approvals; it supports consistent shifting and aims to extend component life compared with conventional fluids. Limitations are that some Infiniti transmissions specify specific factory fluids for optimal long-term compatibility, so owners should confirm the G37 service manual before switching, and specialist fluids for certain later-model CVT-like units may be preferred. The product’s multi-vehicle focus trades one-size-fits-most convenience against the precision fit of a model-specific fluid.
Best for: Risk-averse mainstream buyers who prioritize a proven, widely accepted transmission fluid that simplifies maintenance and reduces the chance of compatibility problems across common light-duty vehicles.
Less Ideal for: Owners seeking a factory-specified, model-tailored fluid or those who prefer dealer-recommended fluids for warranty-sensitive repairs should consider an Infiniti-specified product instead.
- Full synthetic formula with advanced additives for improved thermal and viscosity stability
- Designed to prevent leaks and reduce wear with conditioning and anti-wear agents
- Compatible with a wide range of transmission specifications, simplifying maintenance across multiple vehicles
- Not guaranteed to match every Infiniti G37 factory fluid specification exactly, so manual verification is required
- General multi-vehicle formulation may lack the tailored friction characteristics of a model-specific transmission fluid
Verdict A practical, widely compatible full synthetic ATF that offers strong protection for everyday use but verify Infiniti G37 factory specs before switching.
6. ACDelco DEXRON‑VI Automatic Transmission Fluid, 1 Gallon
| Liquid Volume | 1 Gallons |
|---|---|
| Unit Count | 128.0 Fluid Ounces |
| SAE J300 Viscosity Grade | 5W-40 |
| Recommended Uses For Product | Transmission Fluid |
This ACDelco DEXRON‑VI transmission fluid is a factory‑quality, fully synthetic fluid intended as a direct replacement where Dexron‑VI is specified. It is typically used for drain-and-fill or top‑up service in automatic transmissions and is backward compatible with older Dexron specifications, which makes it a practical choice when you want a single fluid that covers multiple GM‑spec needs. Notable features include improved friction durability, viscosity stability, foam control, and oxidation resistance compared with older Dexron formulas, so it helps maintain consistent shift feel and can extend drain intervals. In everyday use that translates to smoother, more predictable shifting and potentially longer transmission life versus older fluids. Limitations: it is not formulated for CVT or dual clutch transmissions, so confirm your Infiniti G37 requires Dexron‑VI before using it. The product is discontinued by the manufacturer, so finding more later could be less convenient.
Best for: Practical optimizers who want a factory‑quality, backward‑compatible ATF that balances performance and economy for routine transmission service on a vehicle that specifies Dexron‑VI.
Less Ideal for: Drivers looking for a fluid formulated specifically for CVT or dual clutch gearboxes, or those who prefer fluids marketed for extended synthetic performance beyond the Dexron‑VI specification.
- Factory‑quality Dexron‑VI formulation compatible with vehicles that call for Dexron‑VI
- Fully synthetic formula offers improved oxidation resistance and viscosity stability
- Designed to improve friction durability and reduce aeration and foaming for consistent shifts
- Sold in a one‑gallon jug, convenient for multi‑quart drain‑and‑fill jobs
- Not suitable for CVT or DCT transmissions
- Manufacturer lists the item as discontinued which may affect long‑term availability
Verdict A practical, factory‑quality Dexron‑VI fluid that delivers improved stability and shift performance at an affordable value for vehicles that require Dexron‑VI.
7. Valvoline MaxLife Multi-Vehicle Full Synthetic Automatic Transmission Fluid, 1 gal (case of 3)
| Material | Synthetic |
|---|---|
| Liquid Volume | 3 Gallons |
| Unit Count | 384 Fluid Ounces |
| Manufacturer | Valvoline |
Valvoline MaxLife Multi-Vehicle ATF is a full-synthetic transmission fluid designed for broad compatibility and extended service life. It is typically used as a fill or service fluid to improve shift quality, reduce slippage and shudder, and condition seals on higher-mileage transmissions. Notable features include high-performance anti-wear additives, friction modifiers for smooth shifts, and seal conditioners to help prevent leaks. In real-world use this product gives consistent, factory-quality shifting behavior and helps preserve transmission durability under normal driving. Being a multi-vehicle formula it covers a wide range of specifications so it simplifies parts stocking for DIYers and shops. Limitations are that it is a universal-type ATF rather than a model-specific factory replacement, so for Infiniti G37 owners you should confirm the G37 transmission specification before use and prefer fluids explicitly listed by Infiniti if the service manual requires a unique ATF. Packaged as three one-gallon bottles, it is convenient for multiple services but may be more than needed for a single fluid change.
Best for: Balanced owners who want a dependable, widely compatible ATF for routine maintenance and improved shifting without committing to a niche specialty fluid.
Less Ideal for: Owners who require a transmission fluid explicitly specified by Infiniti for warranty or who prefer a fluid formulated only for G37 transmissions.
- Full-synthetic formula with anti-wear additives to help extend transmission life
- Friction modifiers designed to improve smooth shifting and reduce slippage
- Seal conditioners help preserve seal elasticity and reduce the risk of leaks
- Multi-vehicle coverage simplifies selection for general maintenance and multiple cars
- Not a model-specific factory replacement so may not match every Infiniti G37 specification
- Sold as a three-gallon pack which can be excessive for a single transmission service
Verdict A versatile full-synthetic ATF that delivers smooth shifting and seal protection for general use, but check Infiniti G37 spec requirements before substituting.
Choosing the Right Infiniti G37 Transmission Fluid: Key Factors to Consider
Fluid Specification and Compatibility
Using a fluid that matches the Infiniti G37 transmission specification is essential because chemistry differences can change friction behavior and cause erratic shifting or wear.
Verify the vehicle manual specification and choose fluids formulated for that spec to ensure material compatibility with seals and clutches. Mismatched fluids can lead to leaks, degraded shift control, or accelerated component wear, so this should be your first filter.
Friction Characteristics and Shift Quality
Friction properties determine how smoothly gears engage and how crisp or soft shifts feel. A fluid with appropriate friction modifiers supports consistent, repeatable shifts and reduces clutch chatter.
If you value comfortable, predictable shifting, prioritize fluids that advertise stable friction coefficients under the G37’s operating conditions. Uneven friction behavior can cause hesitation, harsh engagement, or slipping during acceleration.
Thermal Stability and Oxidation Resistance
Transmissions generate heat, and fluid that resists thermal breakdown will maintain viscosity and protective film strength longer. Oxidation leads to varnish and deposits that impair valve body function and solenoid operation.
Choose fluids with demonstrated high-temperature performance and antioxidant additives to extend service life. Better thermal stability reduces the frequency of fluid degradation-related issues and helps preserve shift quality in demanding conditions.
Viscosity and Shear Stability
Correct viscosity ensures proper hydraulic pressure and lubrication. Shear stability matters because drastic viscosity loss under mechanical stress can change shift timing and reduce protection.
Look for fluids that retain viscosity after repeated shear cycles, especially if you do highway driving or towing. Maintaining target viscosity supports consistent transmission control and prevents premature wear from metal-to-metal contact.
Additive Package and Wear Protection
A robust additive package provides anti-wear, anti-foam, and corrosion protection that helps extend component life. Friction modifiers, detergents, and anti-wear agents each play a role in clutch life and valve body cleanliness.
Prioritize fluids with proven additive chemistries designed for automatic transmissions. Fluids lacking essential additives can allow accelerated wear or deposit formation that affects long-term reliability.
Serviceability and Change Interval
Consider recommended change intervals and whether the fluid supports routine service practices. Some fluids are designed for extended drain intervals while others are intended for regular replacement.
Plan maintenance based on driving conditions and the chosen fluid’s suggested interval. If you perform your own fluid change, choose a fluid compatible with standard drain and refill procedures and that does not require complex flushing to achieve full benefit.
FAQ
How often should I perform a transmission fluid change on an Infiniti G37?
Recommended intervals vary with driving conditions, but many owners follow scheduled checks every 30,000 to 60,000 miles for typical use. Harsh driving, frequent towing, or heavy city traffic usually calls for more frequent changes. Inspect fluid condition and consult the vehicle manual for manufacturer guidance.
Can I use any automatic transmission fluid in an Infiniti G37?
Not all automatic fluids are interchangeable. The Infiniti G37 requires fluids that meet specific friction and material compatibility criteria. Using a fluid outside the recommended specification can affect shift quality and component life. Match the transmission specification when selecting a fluid.
What are signs my transmission fluid needs service?
Common indicators include slipping, delayed or harsh shifts, unusual noises, or a burnt odor from the transmission. Dark, contaminated fluid or excessive metal particles in the fluid are also warning signs. Address these symptoms promptly to avoid further damage.
Is a fluid flush better than a drain and refill for the G37?
A full flush removes more old fluid but can dislodge deposits that may cause issues in older or high-mileage transmissions. A drain and refill is gentler and still replaces a significant portion of fluid. Choose the method based on fluid condition, mileage, and technician advice for the specific vehicle.
Does synthetic fluid offer real benefits for this transmission?
Synthetic formulas typically provide better thermal stability and shear resistance than conventional fluids, which can help preserve shift quality and reduce breakdown over time. Benefits depend on driving conditions and the fluid meeting the required specifications for the Infiniti G37.
How We Chose the Best Infiniti G37 Transmission Fluid
We focused on fluids formulated to meet Infiniti-recommended specifications and real-world service demands for the G37. Our selection criteria emphasized chemical compatibility with the vehicle's transmission materials, measured friction characteristics that affect shift feel, and thermal stability to resist breakdown under high load and temperature. We also evaluated shear resistance to preserve viscosity over time, additive package durability for long service intervals, and compatibility with common service procedures for the G37. Fluids were excluded if they did not match the vehicle's specified fluid type or lacked documented technical data showing compatibility with the G37's transmission materials. The final list favors fluids that balance shift quality, protection, and service practicality for this specific vehicle application.
Our full evaluation process is outlined in our review methodology.
Conclusion
Selecting the right transmission fluid for your Infiniti G37 means balancing specification compatibility, friction behavior, and thermal durability. Prioritize fluids that match the vehicle’s recommended spec and offer stable friction and oxidation resistance to protect clutches and valve bodies. Consider your driving habits and service preferences when choosing between extended-life and regular-change formulations. Paying attention to these tradeoffs will help maintain smooth shifts and extend the life of the transmission.
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