Instructions for reading transmission oil parameters: What are ATF, CVTF, SAE indexes?

Transmission oil plays an important role in protecting and maintaining the operating performance of the transmission system. However, on the labels of gear oils, you often see symbols such as ATF, CVTF, SAE without clearly understanding the meaning. Correctly reading and understanding these parameters will help you choose the right oil for your vehicle.

Join Gartz to learn in detail about common transmission oil parameters and how to choose the right product for your vehicle.

What is ATF? – Automatic Transmission Fluid

ATF (Automatic Transmission Fluid) is the general symbol for automatic transmission fluid. This is the type of fluid used in traditional automatic transmissions (AT), including some dual-clutch transmissions (DCT) or semi-automatic transmissions.

Some characteristics of ATF oil:

- The viscosity is suitable for the operating mechanism of the automatic transmission.

- Highly resistant to abrasion and oxidation.

- Protects the hydraulic system and helps smooth gear changes.

Some popular ATF indicators:

- Dexron III, Dexron VI: Transmission oil standard of GM (General Motors)

Mercon V, Mercon LV: Ford standards

- ATF G4, ATF G6, ATF SP-IV: Product lines for 4–6-speed automatic transmissions (Gartz has these lines)

CVTF là gì? – Continuously Variable Transmission Fluid

CVTF (Continuously Variable Transmission Fluid) is an oil specifically for CVT transmissions. CVT gearboxes do not use gears but use belts and pulleys to change gear ratios.

Characteristics of CVTF oil:

- Has stable viscosity over many temperature ranges.

- Anti-foaming and friction properties are optimized to match the continuous operation of the CVT.

- Helps reduce belt wear and increase gearbox durability.

Note:

Using ATF oil instead of CVTF will cause serious damage because the operating characteristics are completely different.

What is the SAE index?

SAE (Society of Automotive Engineers) is the organization that sets standards for lubricating oil viscosity. The SAE index often comes with engine oils or manual transmission (MT - Manual Transmission) oils.

Example of SAE index:

- SAE 75W-85 or SAE 75W-90: Used for manual transmissions or rear-wheel drive systems, differentials.

- The number “75W” represents low temperature viscosity, “85” represents high temperature viscosity.

Meaning:

The higher the index → the thicker the oil.

- Oil with the right viscosity helps lubricate well, avoiding gear wear when the vehicle operates at high temperatures or under heavy load.

How to choose the right transmission oil?

To choose the right transmission oil, you need:

- Check the vehicle manufacturer's instructions (manual).

- Know the type of transmission your vehicle is using (AT, CVT or MT).

- Pay attention to vehicle operating conditions (city, road, heavy load...).

Product suggestions from Gartz

Gartz provides transmission oil lines suitable for many types of gearboxes today:

- Gartz ATF G4 – For 4-speed automatic transmission
- Gartz ATF G6 – Optimized for 6-speed automatic transmission
- Gartz CVT Red / CVT Gold – Specialized for CVT gearboxes

- Gartz 9G-HP – High-end for 9-speed transmission in luxury cars
- Gartz MTF 75W-90 – Manual transmission oil meets SAE standards
All Gartz products are manufactured in Singapore with German technology, helping to prolong gearbox life and increase operating efficiency.

Conclude

Understanding and reading the ATF, CVTF, SAE parameters correctly will help you avoid many mistakes during gearbox maintenance. Don't let a small mistake cause big consequences for your car. Always choose the right type of oil and change it periodically as recommended to ensure smooth and durable transmission operation.

Contact Gartz now for advice on choosing the right oil for your vehicle!