Your guide to gearbox oil changes

A car’s gearbox requires adequate oil to keep it running smoothly and effectively. Additionally, changing the oil regularly makes sure it stays in top working order for much longer. 

Also known as transmission oil, selecting the right oil for your gearbox is a vital aspect of taking care of your vehicle’s mechanics. In this article, we’ll explain what manual gearbox oil is, what types are available to you and how to spot the signs of low oil levels. 

What is manual gearbox oil?

Every time you manoeuvre your vehicle, you expect a smooth and easy ride. The gearbox oil plays a major part in this seamless experience, reducing the friction within the gearbox. 

In turn, this decreases overheating and lessens the likelihood of damage over time. The oil you choose must be specific to your vehicle’s needs and should be carefully chosen. Let’s take a closer look at the options available to you. 

Types of gearbox oil

Gearbox oil is often categorised by its base oil. The three main types are: 

• Mineral gearbox oil: Mostly derived from refined crude oil, this is the cheapest choice and is most commonly used in older vehicles that have been on the road a while. It might not always be the best option for more modern cars or demanding driving needs.
• Synthetic gearbox oil: Created from engineered substances, this oil offers a superior level of performance and durability required by the modern driver. 
• Semi-synthetic gearbox oil: If you’re searching for a balance between performance and cost-effectiveness, then semi-synthetic options are a good compromise between the two above options. 

Oil can also be categorised by performance additives and performance classifications. Choosing the right gearbox oil for your vehicle should be done by consulting your vehicle’s manual or seeking the advice of a professional mechanic. 

Signs your gearbox oil is running low

Generally speaking, it’s advised to change your gearbox oil every 30,000 to 50,000 miles. However, this depends on your driving habits. For example, if you regularly drive under harsh or difficult conditions, or regularly stop and start your vehicle, you may need to change the oil more frequently. That’s because your gearbox will be put under more strain compared to the average vehicle. 

Automatic vehicles may only need to change their transmission oil every 60,000 to 70,000 miles, though again, this also depends on driving habits. 

There are some telltale signs your gearbox oil may need changing, which can include: 

• Burning smells
• Fluid leaks
• Transmission warning light 
• Strange noises 
• The transmission slips 
• Dark fluid 
• Sticking gears 

If you are unsure if your oil needs changing or if you’re concerned that the above signs could be indicative of a deeper problem, always make sure to consult with a professional who can talk you through the next steps. 

Trust in total vehicle servicing from Mr Tyre, the leading chain of autocentres for Central England. We have over 50 years of servicing motorists’ cars. Find out how we can help with vehicle maintenance and upkeep by contacting us online or giving your local branch a call today.