Transmission fluids are vital in ensuring smooth shifting, lubrication, and heat dissipation within automatic transmissions. Among the most commonly discussed types are Dexron and Mercon formulations, often labeled together as Dex/Merc.
These fluids are compatible with a wide range of automatic transmissions found in older General Motors (GM) and Ford vehicles, as well as many Asian and European models that require similar frictional characteristics.
Below is a detailed Dex/Merc transmission fluid compatibility chart that shows major brands, equivalent formulations, and suitable replacements.
Dex/Merc Transmission Fluid Compatibility Chart
| Brand / Product Name | Equivalent / Compatible With | Application Notes |
|---|---|---|
| ACDelco Dexron III-H | Mercon, Dex/Merc | Suitable for older GM and Ford automatic transmissions requiring Dexron III or Mercon fluids. |
| Castrol Transmax DEX/MERC | Dexron III, Mercon | Approved for pre-2006 Ford and GM transmissions; not for Type F or LV fluids. |
| Valvoline DEX/MERC ATF | Dexron III, Mercon | Provides smooth shifting; widely used for GM, Ford, and certain imports before 2005. |
| Mobil ATF D/M | Dexron III, Mercon | High oxidation stability; compatible with most domestic vehicles from 1980s–early 2000s. |
| Pennzoil DEX/MERC | Dexron III-H, Mercon | Designed for automatic and power steering systems in older models. |
| Super Tech DEX/MERC ATF | Dexron III, Mercon | Economical universal option for older domestic vehicles. |
| Prestone DEX/MERC ATF | Dexron III-H, Mercon | Offers good anti-shudder performance; not suitable for Dexron VI or Mercon V applications. |
| Kendall DEX/MERC | Dexron III, Mercon | Provides excellent wear protection and oxidation resistance. |
| Wolf’s Head Super Universal ATF | Dexron III-H, Mercon, Allison C-4 | Compatible with most older domestic and import ATFs; multi-vehicle use. |
| Amalie Universal ATF | Dexron III-H, Mercon | Designed for conventional automatic transmissions; not LV compatible. |
| Chevron DEX/MERC | Dexron III, Mercon | Offers protection against clutch wear and sludge formation. |
| Allison C-4 ATF | Dexron III/Mercon | Suitable for off-highway and heavy-duty equipment requiring C-4 performance. |
| NAPA Premium DEX/MERC ATF | Dexron III-H, Mercon | Compatible with pre-2006 GM and Ford transmissions. |
| Lucas Multi-Vehicle ATF | Dexron III-H, Mercon, JWS 3309 | Works in both GM and Ford systems; semi-synthetic formula. |
| Quaker State DEX/MERC | Dexron III, Mercon | Designed for older GM/Ford vehicles; meets wear control standards. |
| Motorcraft MERCON | Dexron III (non-V) | Genuine Ford fluid for transmissions built before 2007. |
| Royal Purple Max ATF | Dexron III, Mercon, Chrysler ATF+3 | Synthetic fluid compatible with multiple systems, providing extended drain intervals. |
| Amsoil Signature ATF | Dexron III, Mercon, Toyota T-IV | Full synthetic option with enhanced thermal stability. |
| Havoline ATF DEX/MERC | Dexron III-H, Mercon | High-performance conventional ATF for older automatic transmissions. |
| AutoZone DEX/MERC (Coastal) | Dexron III-H, Mercon | Budget-friendly choice for older automatic systems. |
| Mag 1 DEX/MERC | Dexron III-H, Mercon | Provides consistent performance in cold and hot conditions. |
| Liqui Moly Top Tec ATF 1100 | Dexron III, Mercon | Premium German blend suitable for many European and Asian vehicles using similar specs. |
| Red Line D4 ATF | Dexron III, Mercon, Toyota T-IV | Fully synthetic, high-temperature fluid suitable for performance vehicles. |
| Idemitsu ATF Type-H | Dexron III, Mercon | Common in some Asian vehicles requiring older GM-type fluids. |
| Triax Global ATF | Dexron III, Mercon, ATF+3, JWS 3309 | Fully synthetic universal fluid for mixed fleets. |
| ENEOS ATF Dex/Merc | Dexron III-H, Mercon | Japanese-manufactured fluid meeting both GM and Ford older specs. |
| FVP DEX/MERC ATF | Dexron III, Mercon | Cost-effective option for general-use automatic and power steering systems. |
| Champion Global ATF | Dexron III, Mercon, ATF+3 | Designed for wide compatibility in mixed fleets and older imports. |
| Phillips 66 DEX/MERC ATF | Dexron III-H, Mercon | Formulated with anti-wear additives and oxidation inhibitors. |
| Schaeffer Supreme ATF | Dexron III-H, Mercon | Synthetic blend offering improved film strength and oxidation control. |
| Blue Diamond Global ATF | Dexron III, Mercon, ATF+4, JWS 3309 | High-performance synthetic for extended drain intervals. |
| Gulf Dexron III/Mercon ATF | Dexron III, Mercon | Universal ATF suitable for passenger cars and light trucks. |
| Petro-Canada DuraDrive ATF | Dexron III, Mercon | Long-life synthetic blend for severe service conditions. |
| Total Fluide AT42 | Dexron III-H, Mercon | European-spec ATF for older vehicles requiring GM/Ford compatibility. |
| Motul Multi ATF | Dexron III, Mercon V, JWS 3309 | Synthetic fluid with extended coverage for European, Asian, and US vehicles. |
| Kroon Oil ATF Dexron III | Dexron III-H, Mercon | European premium ATF suitable for classic GM/Ford models. |
| Petronas Tutela ATF Dexron III | Dexron III, Mercon | For automatic transmissions and hydraulic systems in older cars. |
| Genuine Hyundai ATF SP-II / SP-III | Dexron III equivalent | Compatible with older Hyundai/Kia models calling for Dexron III-type fluids. |
| Mopar ATF+3 (MS-7176) | Dexron III, Mercon | Older Chrysler fluid often used interchangeably in mixed systems. |
| CAT TO-2 Transmission Fluid | Dexron III, Mercon | Used in heavy-duty off-road and construction equipment. |
| Shell Spirax S2 ATF AX | Dexron III, Mercon | Conventional ATF for light-duty automatic transmissions and power steering. |
| Fuchs Titan ATF 3000 | Dexron III-H, Mercon | German-engineered ATF compatible with older GM and Ford transmissions. |
| Kixx ATF DX-III | Dexron III, Mercon | Korean-made fluid designed for older automatic transmission systems. |
| Aisin ATF AFW+ | Dexron III, Mercon, Toyota T-IV | Commonly used in Japanese transmissions needing similar characteristics. |
| Peak DEX/MERC ATF | Dexron III-H, Mercon | High-quality budget option for passenger vehicles and light trucks. |
Related Valvoline MaxLife ATF Compatibility Chart(For All Vehicle Brands)
Best Dex/Merc Transmission Fluids
Click the Links below to Check the Latest Prices on AMAZON
1. Valvoline DEX/MERC ATF
- Formulated for transmissions that require Dexron III, Mercon, Ford M2C138-CJ, M2C166-H, Allison C-4, and TES-389 specifications.
- Provides smooth shifting and anti-shudder protection in all driving conditions.
- Maintains proper flow in both cold and hot weather, ensuring consistent performance.
- Suitable for a wide range of GM, Ford, and import vehicles built before 2006.
- Trusted brand known for long-lasting protection and oxidation stability.
2. Castrol Transmax DEX/MERC ATF
- Meets Dexron-III H, Dexron III, and Mercon performance requirements.
- Offers enhanced friction durability for smoother gear changes and longer fluid life.
- Suitable for pre-2006 GM and pre-2007 Ford automatic transmissions.
- Can also be used in power steering systems that call for Mercon fluid.
- Excellent anti-wear and oxidation resistance for older vehicles.
Related Dexron II Equivalent(Top 5 BEST Equivalent 2025)
3. Red Line D4 Synthetic ATF
- Fully synthetic formula compatible with Dexron III, Dexron II, Mercon, and Mercon V fluids.
- Provides superior low-temperature shifting performance and high-temperature stability.
- Designed for extended drain intervals and high-performance applications.
- Reduces friction and improves fuel efficiency while maintaining protection.
- Ideal for both street and racing transmissions requiring high fluid endurance.
4. Liqui Moly Top Tec ATF 1100
- German-engineered high-performance ATF suitable for Dexron III/Mercon systems.
- Offers outstanding lubrication, thermal stability, and oxidation control.
- Recommended for older European, Japanese, and American vehicles.
- Ensures quiet operation and reduces transmission wear under load.
- Great option for drivers seeking premium-grade, long-life fluid.
5. Star Fire Premium Multi-Purpose ATF Dex/Merc III
- Multipurpose ATF meeting Dexron III/Mercon specifications for older transmissions.
- Formulated for use in automatic transmissions, power steering units, and hydraulic systems.
- Provides excellent anti-foam, anti-wear, and corrosion protection.
- Budget-friendly option offering solid performance for everyday vehicles.
- Designed for consistent frictional properties to ensure smooth shifting.
Related ATF Oil Suitable for Power Steering(Top 4 Best ATF Picks)
Understanding Dexron and Mercon Compatibility
Dexron and Mercon fluids share similar frictional characteristics, which is why many modern multi-vehicle fluids list both specifications as “Dex/Merc.”
Here’s a quick breakdown of what they mean:
- Dexron III – A General Motors specification for automatic transmissions before Dexron VI was introduced.
- Mercon – Ford’s ATF specification used before Mercon V and Mercon LV.
- Dex/Merc – A universal term used by fluid manufacturers for products that meet both Dexron III and Mercon standards, ideal for transmissions requiring either of those.
Note: Dexron VI and Mercon LV are not backward compatible with all Dex/Merc systems due to their different viscosities and friction modifiers.
Related ATF Viscosity Chart(For ALL Types)
When to Use Dex/Merc Transmission Fluid
Use Dex/Merc fluids in vehicles or equipment that:
- They were built before 2006 for GM and in 2007 for Ford.
- Specify Dexron III or Mercon (non-V) in the owner’s manual.
- Require ATF for hydraulic systems, power steering, or transfer cases.
Avoid using Dex/Merc in vehicles calling for:
- Dexron VI
- Mercon V / LV / SP
- Chrysler ATF+4
- Toyota WS or Honda DW-1
Benefits of Using Compatible Dex/Merc ATF
- Smooth Shifting: Provides the right friction level for seamless gear transitions.
- Wear Protection: Reduces metal-to-metal contact in clutch packs and planetary gears.
- Thermal Stability: Withstands heat, preventing varnish and sludge.
- Seal Conditioning: Helps prevent leaks by maintaining seal elasticity.
- Compatibility: Works across a broad range of pre-2000s domestic and import vehicles.
Related Nissan ATF D3M Equivalent(Top 5 Best Equivalent 2025)
Common Vehicles That Use Dex/Merc ATF
- Older Chevrolet Silverado, Tahoe, Suburban (pre-2006)
- Ford F-150, Explorer, Crown Victoria (pre-2007)
- Buick LeSabre, Pontiac Grand Prix
- GMC Sierra, Yukon
- Some Toyota, Nissan, and Isuzu vehicles require Dexron III equivalent fluids.
FAQS
What is Dex Merc compatible with?
Dex/Merc transmission fluid is compatible with vehicles that originally specified Dexron III or Mercon automatic transmission fluid. It’s suitable for use in pre-2006 General Motors and pre-2007 Ford transmissions, as well as some Chrysler, Toyota, Nissan, and Isuzu systems designed around similar frictional characteristics. Dex/Merc can also be used in hydraulic systems, transfer cases, and power steering units, where these older specifications are recommended.
What cars take Dex Merc transmission fluid?
- Chevrolet Silverado, Tahoe, Suburban (before 2006)
- GMC Sierra, Yukon (before 2006)
- Ford F-150, Explorer, Crown Victoria (before 2007)
- Buick LeSabre, Pontiac Grand Prix, Oldsmobile Cutlass
- Dodge Ram (older models using ATF+3 equivalents)
- Toyota Camry, Corolla (1990s–early 2000s with Dexron III spec)
- Essentially, if your vehicle’s owner’s manual lists Dexron III or Mercon (non-V), Dex/Merc is the correct fluid type.
Is Dex Merc the same as Dexron III?
Dex/Merc and Dexron III are functionally very similar. Dex/Merc is a universal formulation designed to meet both Dexron III (GM) and Mercon (Ford) performance standards. While it’s not an official GM-licensed product, it provides equivalent frictional properties, viscosity, and wear protection, making it a reliable substitute for older systems that specify Dexron III.
Is Valvoline Dex/Merc compatible with Dexron VI?
No, Valvoline Dex/Merc is not compatible with Dexron VI. Dexron VI is a lower-viscosity, full synthetic fluid designed for newer GM transmissions and cannot be mixed with or used in place of Dex/Merc. Using Dex/Merc in a Dexron VI system (or vice versa) can cause harsh shifting, slipping, or accelerated wear. Always match the fluid type specified in your owner’s manual.
Is Dex Merc the same as Mercon V?
No. Dex/Merc and Mercon V are not the same. Mercon V contains different friction modifiers and base oils, developed for newer Ford transmissions to reduce shudder and enhance torque converter performance. Dex/Merc should only be used in transmissions that specifically call for Mercon (non-V) or Dexron III fluids. Using Dex/Merc in a Mercon V application may cause improper clutch engagement or shifting issues.
What is Dex Merc transmission fluid for?
Dex/Merc transmission fluid is formulated for older automatic transmissions that require Dexron III or Mercon specifications. It serves several purposes:
- Lubrication: Reduces friction and wear between gears and clutches.
- Cooling: Helps dissipate heat generated during transmission operation.
- Hydraulic Function: Enables proper pressure transfer for gear shifting.
- Seal Conditioning: Keeps seals soft and prevents leaks.
- It’s also used in power steering systems and transfer cases, making it a versatile, multi-application fluid for older vehicles and equipment.
Final Thoughts
Dex/Merc transmission fluids remain a trusted option for older vehicles needing reliable, proven ATF formulations. Always verify your vehicle’s manual to ensure proper fluid compatibility and performance. Using the right Dex/Merc-equivalent product will help your transmission run smoother, cooler, and last longer.
