Should You Use 80W-90 or 75W-85 Gear Oil for a Manual Transmission? A Detailed Comparison.

When changing the transmission fluid in a manual transmission vehicle, choosing the right fluid suitable for the vehicle type and usage conditions is crucial.

One of the questions that many car owners frequently ask is"Should I choose 80W-90 or 75W-85 transmission fluid for a manual transmission?"Let's analyze these two types of oil in detail with Gartz and find the best option for your vehicle!

1. What are 80W-90 and 75W-85 transmission oils?

80W-90 Gear Oil:

- Designed with high viscosity, it is suitable for vehicles operating under heavy load conditions, in hot climates, or when you have to travel on steep, mountainous terrain.

- This type of oil provides excellent lubrication at high temperatures, reducing friction and protecting critical gearbox components.

- However, 80W-90 oil may feel a bit heavy at startup and less smooth during gear changes compared to 75W-85 oil.

75W-85 Gear Oil:

- This type of oil has lower viscosity, which helps the car run more smoothly, making starting and shifting gears easier, especially when driving in the city.
- Suitable for cool climates and when you mainly travel on flat roads or in urban traffic.
- Special, Gartz 75W-85 gearbox oilDesigned to help save fuel while reducing friction and wear, keeping the gearbox durable and running smoothly.

2. Comparing 80W-90 and 75W-85

Criteria	80W-90	75W-85 (Gartz)
Starting viscosity	High, allowing it to operate at high temperatures.	Low temperature, easy to start at low temperatures.
Fuel efficiency	Less saving	Optimal fuel efficiency
Suitable for	Hilly terrain, heavy loads, hot climate.	The city has light traffic and a cool climate.
Gear shifting efficiency	Stable, but sometimes a little heavy.	Smooth, easy gear changes, no jerking.

3. Which type should I choose for a manual transmission car?

Choose Gartz 75W-85 when:

- The vehicle mainly travels within the city, on flat roads with light traffic.

- The climate where you live isn't too hot, and the vehicle isn't operated under heavy load for extended periods.
- You want your car to run smoothly, be fuel-efficient, and protect your transmission in the long run.

Choose 80W-90 when:

- The vehicle frequently carries heavy loads, climbs mountain passes, or travels in hot, harsh conditions.

- A type of oil that provides good lubrication at high temperatures and when the gearbox is operating at high power is needed.

4. Benefits of Gartz 75W-85 Gear Oil

Gear oil75W-85 GartzIt offers many significant advantages over manual transmissions:

- Fuel savingReducing friction helps the engine run more efficiently and save fuel.
- Engine protectionThis special formula helps protect the internal components of the gearbox, extending their lifespan.

- Operates smoothlyIt helps the car shift gears smoothly, without jerking or a heavy feeling when starting.

5. Things to note when changing transmission fluid.

- Check the transmission fluid regularly.Ensure the transmission fluid is not low, is clear in color, and has no burnt odor.
- Use quality engine oil.Choose engine oil from a reputable brand, such astransmission oil

- Change the oil on schedule.According to the vehicle's maintenance schedule, this is usually every 30,000-50,000 km or sooner depending on usage conditions.