Car Repair Tip: Fuquay-Varina, NC

Transmission and engine oil are vital yet enormously different oils for your automobile. Transmission oil is a hydraulic liquid, while engine oil is a lubricant. 

They both might look identical, but they serve completely diverse purposes. Engine oil aids in boosting the engine’s fuel efficiency and performance. 

Transmission oil delivers power to the hydraulic components and the car’s transmission. Engine fluids are used for engine lubrication and can’t be used as hydraulic oil. 

So, both these oils have diverse roles to play. In today’s guide, we will discuss the contrasts between these two. So, let’s begin.

What Is Transmission Oil?

It lubricates the critical parts of a vehicle’s transmission. It aids in deriving optimum performance and efficiency. The transmission fluid’s purpose is to guarantee the smooth and impeccable working of the whole transmission system. 

Experts at car repair Fuquay-Varina, NC shop, recommend changing the manual transmission oil every 50,000 to 80,000 km. However, you should change automatic transmission fluid every 80,000 to 100,000 km in Fuquay -Varina, NC.

What Is Engine Oil?

Motor or engine oil lubricates internal combustion engines’ important parts. It comprises lubricants and base oils incorporated with multiple additives such as dispersants, antiwear additives, and multi-grade oils. 

It also enhances the viscosity index to guarantee the seamless working of the engine and its critical components. Professionals at affordable car repair in Fuquay-Varina, NC, recommend changing engine oil every 5,000 to 8,000 km.

Differences Between Transmission Oil And Engine Oil

Here are the key dissimilarities between engine oil and transmission oil.


Both engine oil and transmission oil are fluids; they seem totally different.

Engine Oil

Engine oil is translucent in hue with an amber colour to it. It has a lower viscosity, so it runs better between the engine components. It gets darker over time. Expired oil seems dirty and has suspended elements.

Transmission Oil

It can range from dark red to green. Automatic transmission oil is usually red, and manual transmission oil is dark green. Continuously variable transmission oil is usually green and translucent. 


Time and mileage affect engine oil and transmission oil differently.

Engine Oil

It diminishes effectiveness with mileage and time. Depending on the motor oil type, you will have to get an oil change service in Fuquay-Varina, NC, to replace it every 3000 to 6000 miles. If you don’t replace it for too long, it will lose its properties, impairing the car engine.

Transmission Oil

Transmission oil does not need to be replaced as frequently. Manual transmission oil may need replacing between 30,000 to 60,000 miles. Nevertheless, automatic transmission oil will require changing around 60,000 to 100,000 miles. 

Transmission oil levels don’t drop in a shorter period, so if you notice lower transmission oil levels, get it examined by a car repair shop in Fuquay-Varina, NC, for a transmission oil leak.

What Happens If You Put Motor Oil In The Transmission?

A small amount of engine oil won’t impair the transmission system. However, if you add excess engine oil and allow it to stay, you may witness the following signs:

  • Slipping gears while driving
  • Too much noise from the gearbox
  • Grinding sensation

In a nutshell, transmission oil is for the gearbox, and engine oil is for the car’s engine in Fuquay-Varina, NC. Don’t confuse between these two, as they may seem similar but serve different purposes. Whether you are looking for transmission oil or engine oil change, always reach professionals for assistance.

World Class Auto has been serving the people of Fuquay-Varina for over 25 years. World Class Auto is Fuquay-Varina’s premier automotive repair provider. Fuquay-Varina Residents and Business Owners have come to trust us for their Automotive Repair.

Call us today! (919) 876-8011

You can also schedule your appointment today by clicking below.

Book An Appointment or check out our Google Reviews!