What is ATF Transmission Fluid? Everything You Need to Know About ATF Fluid for Cars

The role of transmission fluid in automatic transmissions.

ATF (Automatic Transmission Fluid) performs many important functions in an automobile's drivetrain system:

- Hydraulic power transmission: ATF oil is the primary power transmission medium in the hydraulic system of an automatic transmission, enabling the control valves to operate precisely.

- Lubricate moving parts: Reduce friction between gears, bearings, and other mechanical components inside the gearbox.

- Gearbox cooling: Absorbs and dissipates heat generated during gearbox operation.

- Corrosion protection: Creates a protective film that shields metal surfaces from oxidation and corrosion.

- Maintaining hygiene: Dissolving and flushing away dirt and metal particles generated during operation.

Structure and Characteristics of ATF Oil

ATF oil is not simply ordinary lubricating oil. It is a complex mixture that has been researched and developed with many high-quality additives.

Basic components of ATF oil

Base Oil: Makes up 70-90% of the composition and can be semi-synthetic mineral oil or fully synthetic oil.

Additive system: Includes antioxidants, anti-corrosion agents, viscosity index improvers, detergents, and various other functional additives.

Coloring agents: Help identify the type of oil and detect leaks.

Friction reducer: Controls the appropriate coefficient of friction for different types of gearboxes.

Common ATF quality standards

Standard	Describe	Application
Dexron VI	General Motors standards	Xe GM, Chevrolet, Opel
MERCON V	Ford Standard	Xe Ford, Lincoln, Mercury
JWS 3309	Toyota/AISIN Standard	Xe Toyota, Lexus
CVT Fluid	Specifically for CVT transmissions.	Xe Nissan, Honda, Subaru
DCT Fluid	Specifically for dual-clutch transmissions.	Xe BMW, VW, Audi, Porsche

Common Types of ATF Oils Currently Available

Synthetic ATF

This is the highest quality ATF oil, manufactured from synthetic base oils using advanced technology. Synthetic ATF oil has superior oxidation resistance, maintains stable viscosity under extreme temperature conditions, and significantly extends gearbox life.

Semi-Synthetic ATF (Automatic Fat-to-Fuel Fluid)

As a blend of mineral and synthetic oils, this type of oil offers good performance at a more reasonable price. It's suitable for used vehicles with average mileage.

ATF oil for CVT transmissions

CVT (Continuously Variable Transmission) gearboxes require specialized oil with specific friction properties. Using the wrong type of oil can cause belt slippage and serious damage to the gearbox.

ATF oil for dual-clutch transmissions (DCT)

Dual Clutch Transmission (DCT) gearboxes operate on a different principle than conventional automatic transmissions, requiring high-temperature resistant ATF oil and specific clutch lubrication capabilities.

ATF G4 Oil - A Trusted Choice from Gartz

Gartz proudly introduces the GARTZ ATF G4 product line – a premium automatic transmission fluid meeting international standards, suitable for most 4-6 speed automatic transmissions on the Vietnamese market.

Key features of GARTZ ATF G4

Quality standards: Meets Dexron IV, MERCON V, and stringent OEM standards.

Comprehensive protection: Effective abrasion resistance, oxidation resistance, and anti-foaming properties.

Stable performance: Maintains stable viscosity over a wide temperature range from -30°C to 150°C.

Long lifespan: Extended service life thanks to advanced additive technology.

Applications of Gartz ATF G4

GARTZ ATF G4 oil is recommended for use in automatic transmissions of many popular car brands in Vietnam, including Toyota, Honda, Mazda, Hyundai, Kia, and many others.

How to Change ATF Oil Correctly

When should I change my ATF (Automatic Transfer Fluid)?

According to recommendations from car manufacturers, ATF (Automatic Transfer Fluid) should be checked and replaced periodically:

Replace regularly: Every 40,000 - 60,000 km or 2-3 years depending on usage conditions.

Check the oil level: Every time you change the engine oil or when you notice any unusual signs.

Signs that the oil needs replacing immediately: The oil is thick and black, has a burnt smell, the oil level drops suddenly, or the transmission is not running smoothly.

Standard ATF oil change procedure

1. Preparation: Ensure the vehicle is standing on a level surface and the engine has cooled down for about 30 minutes.

2. Drain the old oil: Remove the oil drain plug and drain all the old oil from the transmission.

3. Replace the oil filter: The ATF oil filter should be replaced at the same time as the new oil.

4. Add new oil: Use a funnel and pour in the correct amount of oil as recommended by the manufacturer.

5. Check the oil level: Start the engine, shift the transmission through the gears, and check the oil level on the dipstick.

Important note: Never use the wrong type of ATF oil or oil from an unknown source. Using the wrong oil can cause serious damage and costly repairs.

Common Mistakes When Using ATF Oil

Mistake	Consequence	How to fix it
Using ATF oil that does not meet specifications.	The gearbox operates roughly, increasing friction.	Check the vehicle's owner's manual and select the correct specifications.
Mix different types of oils	Chemical reaction, producing residue.	Do not mix; drain all the old oil before adding new oil.
If the oil level is insufficient, replace it.	Lack of lubrication, torque converter failure.	Pour the correct amount according to the specifications.
Ignore the oil change deadline.	The oil loses its effectiveness, and the gearbox fails prematurely.	Adhere to the scheduled maintenance plan.
Using low-quality oil	Reduced gearbox lifespan, increased repair costs.	Only buy genuine oil from reputable dealers.

Why Choose Genuine ATF Oil?

Quality is verified: The product undergoes a rigorous testing process according to international standards.

Optimal engine protection: Premium additives significantly extend gearbox life.

Stable performance: Smooth gear changes and better fuel efficiency.

Absolute safety: Minimizing the risk of unexpected damage.

Frequently Asked Questions About ATF Oil

Q: Can ATF oil be used as a substitute for regular engine oil?

Q: Absolutely not. ATF oil has a completely different formula and properties than engine oil. Using the wrong type of oil can cause serious damage to the automatic transmission.

Q: Why does ATF oil turn black after a period of use?

Q: The black color of ATF oil is a normal sign of heat absorption and dirt buildup. However, if the oil is thick and black with a burnt smell, it's time to change it immediately.

Q: Do I need to replace the ATF oil filter every time I change the oil?

Q: It is highly recommended to replace the ATF filter at the same time as the oil. A dirty filter will not filter effectively and will affect the quality of the new oil.

Q: Can G4 ATF oil be used in a CVT transmission?

Q: No. CVT transmissions require a specific type of oil. Gartz has CVT RED and CVT GOLD product lines specifically designed for CVT transmissions.

Q: Where is a reputable place to get my ATF oil changed in Ho Chi Minh City?

Q: You can contact Gartz at 64 D9 Street, Manhattan Area, Long Binh Ward, Thu Duc City, Ho Chi Minh City or call the hotline 0981 125 189 for advice and support.

Conclude

Automatic transmission fluid (ATF) plays a crucial role in maintaining the performance and lifespan of automatic transmissions. Understanding ATF, choosing the right type, and adhering to a regular maintenance schedule will help your vehicle run smoothly and reliably.

Partner with Gartz – a reputable lubricant brand from Singapore with over 25 years of experience – to provide the best care for your beloved vehicle.