The quickest answer is that it depends on the transmission type. For the automatic transmission, Mazda generally requires Mazda’s own ATF MZ or a Dexron VI–compatible fluid that meets Mazda’s specifications. For the manual transmission, a dedicated manual transmission fluid (MTF) that meets Mazda’s GL-4 specifications is used. Always verify with your owner's manual or a Mazda dealer for your exact VIN, as configurations can vary by market.
Automatic transmission (6F35) in the 2013 Mazda3
Recommended fluids
Before listing options, note that automatic transmissions in the 2013 Mazda3 typically use a Mazda-approved ATF or a Dexron VI–compliant fluid that states it meets Mazda’s ATF MZ spec on the label. Using a fluid outside Mazda’s specification can affect shifting quality and longevity.
- Mazda Original Automatic Transmission Fluid MZ (ATF MZ)
- Dexron VI–compatible automatic transmission fluid that explicitly meets Mazda’s ATF MZ specifications on the packaging
Conclusion for the automatic transmission fluids: stick with Mazda’s ATF MZ when possible, or a Dexron VI–compatible fluid that is labeled as meeting Mazda ATF MZ specifications. Do not substitute fluids that do not carry Mazda’s MZ compatibility marker.
Manual transmission fluid requirements (if your 2013 Mazda3 has a manual transmission)
Recommended fluids
Manual transmissions in Mazda vehicles use a dedicated manual transmission fluid (MTF). The fluid should meet Mazda’s GL-4 specification or the manual’s listed requirements. If you’re replacing or topping up, use a fluid that is explicitly approved for Mazda manuals and compatible with GL-4 gear oils.
- Mazda Genuine Manual Transmission Fluid (MTF) meeting GL-4 specifications
- High-quality GL-4 75W-90 gear oil; if used, confirm it matches the manual’s stated viscosity and specification in the owner’s manual
Conclusion for the manual transmission fluids: use Mazda’s own MTF when available, or a GL-4–rated gear oil that the owner’s manual approves. Avoid fluids that are not GL-4 rated or not specified for Mazda manuals.
How to verify your specific car’s fluid requirement
To ensure you choose the correct fluid for your exact vehicle, follow these steps:
- Refer to the owner’s manual for the exact fluid specification and viscosity recommended for your transmission type.
- Check the transmission code or model (automatic vs manual) on the transmission case or service label if visible, and confirm with Mazda’s official data for your VIN.
- Consult a Mazda dealer or a trusted automotive technician if you’re unsure about compatibility or changes in market specifications.
Bottom line: use Mazda-approved fluids for your 2013 Mazda3’s transmission when possible. If you must substitute, ensure the alternative explicitly meets Mazda’s specifications (ATF MZ for automatics; GL-4 MTF for manuals).
Summary
The 2013 Mazda3 can use two different fluid families depending on transmission type. Automatics typically require Mazda Original ATF MZ or a Dexron VI–compatible fluid labeled as meeting Mazda ATF MZ specifications. Manuals require a GL-4–rated manual transmission fluid, with Mazda’s MTF being the safest choice. Always verify with your owner’s manual or a Mazda dealer to confirm the exact specification for your vehicle’s VIN, and follow proper service procedures when changing or topping up.