Honda ATF DW-1 is the official automatic transmission fluid used in most Honda and Acura vehicles with conventional automatic transmissions. It lubricates, cools, and protects the transmission, helping to maintain smooth shifts and long-term reliability.
What DW-1 is and why it matters
DW-1 is a synthetic automatic transmission fluid formulated to meet Honda’s performance and reliability standards. It is designed to provide consistent shifting, hydraulic stability, and wear protection across a wide range of temperatures. Using DW-1 in transmissions that specify it helps preserve original performance and prolong transmission life.
Where DW-1 is used
To determine whether your vehicle uses DW-1, consult the owner's manual or a dealer service bulletin. The following points cover typical usage and compatibility to help you identify when DW-1 is appropriate.
- DW-1 is intended for most Honda and Acura automatic transmissions that specify DW-1 in the owner’s manual or service information.
- CVT-equipped models generally use a dedicated CVT fluid (such as Honda HCF-2); DW-1 is not the standard CVT fluid. Always use the fluid specified by Honda for CVTs.
- Manual transmissions use gear oil, not ATF DW-1.
- Do not mix ATF types; if you are replacing fluid, use DW-1 or an approved equivalent and follow the service procedure for your model.
- Check for any model-specific notes, bulletins, or warranty considerations that might affect fluid choice.
In short, DW-1 is the OEM specification for many Honda/Acura automatics; verify your model's requirement before use.
Maintenance and service guidance
Maintenance best practices for DW-1 focus on using the right fluid, adhering to the recommended service interval, and following proper replacement procedures.
- Check the owner's manual or dealer bulletin to confirm that DW-1 is the required ATF and to identify the recommended service interval.
- If replacement is due, perform a drain-and-fill (or flushing if specified by the service procedure) using DW-1 and a new filter where applicable and permitted by the model.
- Refill to the correct transmission fluid level when the transmission is at the proper temperature, using the dipstick or service height specification.
- Use genuine Honda ATF DW-1 or an approved equivalent; avoid mixing fluids, and dispose of used fluid according to local regulations.
- Inspect for leaks, gasket/seal wear, and shifting performance after service; have a professional check if you notice slipping, rough shifting, or overheating.
Intervals and procedures vary by model, so always rely on the official guidance for your vehicle.
Choosing and buying DW-1
Here’s what to consider when shopping for DW-1 ATF:
- Use Genuine Honda ATF DW-1 or an approved equivalent (e.g., Idemitsu DW-1); ensure the product explicitly lists DW-1 compatibility.
- Avoid non-DW-1 fluids unless your manual approves them; using the wrong ATF can impact shifting and transmission life.
- Most auto parts stores, dealerships, and online retailers stock DW-1; check the label for “DW-1” or “DW1.”
- When in doubt, reference the vehicle’s manual or consult a technician to confirm the correct specification.
Having the right fluid is essential to protect the transmission's performance and longevity. If your vehicle is under warranty, using the specified DW-1 can help maintain coverage.
Frequently asked questions
Is DW-1 the same as Dexron or Mercon ATFs?
No—DW-1 is Honda's own specification. Some older manuals may specify Dexron or Mercon, but DW-1 is the recommended fluid for Honda transmissions that call for it. Always confirm with the owner's manual.
Can DW-1 be used in a CVT?
Most Honda CVTs require a dedicated CVT fluid (often labeled HCF-2 or another Honda CVT specification). DW-1 is not recommended for CVTs unless the manual specifically states compatibility.
Can I mix DW-1 with other ATFs?
Avoid mixing fluids. If you are topping off, use the same specification and consider a full replacement under the guidance of a technician.
Summary
Honda ATF DW-1 is the OEM automatic transmission fluid for many Honda and Acura models with conventional automatic transmissions. It is designed to provide reliable lubrication, cooling, shift quality, and wear protection when used as specified by the manufacturer. Always confirm model-specific requirements in the owner's manual and use genuine DW-1 or an approved equivalent. For CVTs or manual transmissions, use the fluids or oils defined by Honda for those systems.