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Your vehicle performance is directly linked to its proper and routine maintenance. And no, it’s not the engine oil that should have your attention at the moment. Although engine oil is obviously vital, gear oil is often underestimated and vehicle owners don’t often pay sufficient attention to this significant fluid. Gear oil is rarely seen and isn’t likely to cause an issue over the vehicle’s course of life but that doesn’t stop it from having regular inspections. As with the other components of the car, if the gear oil goes wrong, it can highly damage the vehicle. Don’t wait any longer to find out if anything is wrong with your gear oil. Check today to recognize the error early and respond quickly.

Gear oil is designed to protect the vital parts of the vehicle, including the gears and bearing in the drive axles and differentials, power take-off units, industrial gearboxes, and transmissions. Phew! Yes, it’s in charge of several component maintenances and yet, you often neglect it. The fluid has a higher viscosity for easy distribution and protection of the complete gear set. Thus, it’s incredibly crucial to choose the right gear oil for your car. It’s tempting to use a lower-quality or off-brand gear oil. However, using high-quality lubricant is the only way to ensure excellent equipment performance. At Carorbis, we offer premium gear oils with protective additives to boost durability and reduce sludge and carbon varnish buildups in your vehicle. Every gear oil at our site is from recognized brands, known for their effectiveness and reliability. We provide you the best of both worlds in terms of quality and price with every gear oil bottle to fine-tune your vehicle. Shop for the best gear oil today.


Gear oil for cars are lubricants designed for lubricating, cooling, and protecting the geared systems. Most importantly, it helps your vehicle to run smoothly by preserving it from wear and heat damage of the vital internal components. If you don’t provide adequate lubrication to your vehicle, it often results in scouring, scuffing, and pitting of the important components. Such catastrophic damage can also hinder your car’s performance, and eventually cost you a ton of repair money. To prevent such conditions, you must use gear oil at a proper interval to keep your car running.

The fluid reduces friction, lowers the operating temperature, and optimizes performance. It also takes away damaging wear debris from the contact zones and blocks it from creating sound in the gear operation. The fluid has a strong sulfur-like smell and contains extreme pressure additives to include higher performance in vehicles. Compared to engine oil, it has a higher viscosity, making it optimal for protecting the gears and causing a smooth transition between them.


Before buying any gear oil, make sure you are aware of the different oil grades. Read below to know more about base oil grade and many other crucial details.


The base grade determines the qualities of the gear oil. It is denoted by a GL number. Most of the base grades are out of date now, with only GL-4 gear oil and GL-5 being in current use.

  1. GL-1 to GL-3 -

    These fluids were basic and out of date. The gear oils are known to be incompetent to cope with extreme pressure, heat, and friction.
  2. GL-4 -

    With reduced air flow, the functioning of multiple parts of the engine system is affected. Hence, replacing air filters regularly plays an essential role in keeping your engine in its best condition and increasing the fuel efficiency.
  3. GL-5 -

    It contains more additives than GL-4. Popular for extreme load resistance and protecting systems like hypoid gears.


Gear oils have two separate grading systems. Here’s what both these grading convey -

  1. SAE-Grade Gear Oils -

    SEA grades label gear oils with a W. There’s a monograde engine oil SEI grade which only has a single number. The W is present besides the number with gear oils for cold seasons while the oil for hot summer days contains just a number. The viscosity of the gear oil is determined by the number count.
    You must have come across 80W-90 gear oil or 75W-140 gear oils while buying at the store. The initial number before “W” in the oil, for instance, 80W-90 indicated the performance at 0°C, while the last number shows the lube’s performance at 100°C.
  2. ISO-Grade Gear Oils -

    ISO grades are International standards for lubricating oils. This grade denotes the numerical rating of the viscosity of the lubricants. Viscosity means the thickness of the oil or a measure of the fluid’s resistance to flow. Thus, the higher the number, the higher the viscosity of the fluid. It signifies the viscosity number in centistokes (cST). For example, ISO 3 is equivalent to 3.2 cST and ISO 220 is equal to 220cST. ISO oil grading is easy to read.

What are the different gear oil types?

Gear oils come with a wide range of different additives, making them suitable for different situations. Here are the most common gear oil types -

  1. R&O Gear Oil -

    It stands for rust and oxidation, designed for reducing corrosion within the gearbox. The ISO grade for R&O gear oils is between 32-320. Although the majority of gear oil comes with protection from rust and oxidation, it’s the most suitable one to preserve the gearbox from rust and damaged debris. The oil offers two major benefits - protecting the gear and other components from corroding and preventing minute debris from oxidizing, thus, increasing the lifespan. The R&O gear oil is used in vehicles with relatively high speed, low load, and uniform loading.
  2. Compounded Gear Oil -

    It’s the combination of gear oil with fatty oils, making it one of the thickest viscosity oils. By mixing together with the right additives, you get the suitable oil for low-speed, high-pressure application and also offer higher lubricity to the vehicle.
  3. Extreme Pressure Gear Oils -

    This type of gear oil is designed to stand up against immense heat and pressure. Naturally, these gear oils contain a lot of additives, making them also dangerous at times. So you’ll have to be extra careful while using it. These oils contain agents made with a base of chlorine or sulfur, making it perilous for few metals. Use the gear oil only when asked by a manufacturer.
  4. Synthetic Gear Oils -

    Made up of polyalphaolefin and other additives, synthetic gear oils are mostly used for extreme machine conditions. In case of higher or lower temperatures, synthetic gear oils work the best where other types of gear oil will fail to do so. It’s available in ISO grades between 32 to 68000 with a higher viscosity. Synthetic oils are suitable for vehicles with heavier loads, higher speeds, and hotter temperatures.


Don’t neglect the crucial signs of a gear oil change. Here are effective ways to help you identify -

  1. When Transmission or Differential Oil is Low -

    If you have a low oil level, the vehicle won’t receive proper lubrication in all the moving parts, making it highly vulnerable to damage and tear. Fortunately, there are various easy ways to check the transmission oil level in your vehicle. However, if you are unable to see the oil level, check the state of the gear in the vehicle. If it appears dark or gritty, then it needs to change immediately.
  2. When Sounds Comes from the Gearbox -

    Gearboxes comprise different gear that intertwines with one another. To ensure that all gears and components work smoothly with each other is by the quality of lubricating oil used in the vehicle. When your gear oil isn’t changed or low for a long time, it’s unable to lubricate the gears properly, resulting in noise coming out of the gears. Although any noise coming from your vehicle is a cause of concern. However, if the noise is from the gearbox, then you must take immediate action as it can damage important internal parts of the vehicle.
  3. If the Gearbox is Slipping or Not Selecting Gears -

    If you notice your car slipping between gears or the gears are jerky, then there’s damage to the transmission system. Check the gear oil level, if it appears dark and nitty then it needs to be changed instantly. If the gear oil is low, then fill the tank. If filling the system doesn’t work, then the internal component is already damaged. Visit your local mechanic shop to identify the problem.
  4. When the Check Engine Light is Switched On -

    The check engine light causes a lot of worry among drivers. If there’s a signal, then make sure to check if anything is wrong with your vehicle. The check engine light is one for many reasons, one being low gear oil. So don’t neglect the early signs and take a thorough look if there’s any issue with the gear oil.
  5. Burning Smell Coming From the Gearbox -

    If your gearbox smells then there must be an oil leak in the system. Check the driveway or underneath the vehicle to spot oil leaks. If your vehicle isn’t properly lubricated, it can also heat up the gearbox, resulting in a burning smell. The oil's poor quality or old oil use can also fail to lubricate the vehicle components properly and heat up the parts excessively. We recommend a car inspection by a professional to recognize the issue instantly.


To prolong the gearbox’s life and save a ton from costly repair, we offer premium gear oils for improved durability and performance. If you are looking for the best gear oil, then Carorbis is the one-stop hub for all your requirements. We bring you a wide range of excellent gear oils from popular brands from across the world at an affordable range. So bring your search for the best “gear oil near me” to a stop and simply place an order from us. Hop on to our site, and select from an expansive range of gear oils online. Carorbis comprehensive range of gear oils provides the performance your vehicle deserves at budget-friendly pricing.

Shop gear oil at the comfort of your home, and choose from International and national oil brands. We deliver original, and excellent quality gear oils within 3 to 4days of working days. Our delivery charges are at the lowest in the market, while free delivery for purchase above INR 500. You can also access cash on delivery by paying a small amount of INR 40. Buy the best gear oil to ensure maximum efficiency, smooth operations, and higher reliability of your vehicle. Protect your vehicle from potential issues like corrosion, contamination, and other damage and achieve maximum service life by using the best gear oil.


Q 1. When to change gear oil in a car?

Ans. Cars vary from one another so it’s best to stick to the owner manual for effective advice. If you drive your car in a normal condition, then we recommend changing gear oil every 48,000 to 80,000 km for an automatic transmission while 96,000 to 160,000 km for a manual transmission. But if your car is run in severe conditions, like driving in the mud, then you need to change the gear oil every 24,000 km.

Q 2. What is the best gear oil for cars in India?

Ans. You can buy the best gear oils for cars in India at Carorbis, the biggest platform for authentic and excellent quality fluid products.

Q 3. What happens if you don’t change your gear oil?

Ans. Naturally, not changing gear oil can cause severe negative repercussions to the vehicle’s performance. You will risk severe damage to your vehicle transmission and other gear systems. It will result in replacing parts, causing expensive repair costs. It’s important to understand that gear oil needs to be changed at a regular interval. The metal-on-metal contact in the gearbox requires optimal lubrication to run the vehicle smoothly. Change your gear oil regularly to increase the life of your vehicle transmission.

Q 4. How do I know which gear oil to use?

Ans. To understand the suitable gear oil for your vehicle, check your manual. Using the wrong gear oil can cause poor performance or internal parts damage in the vehicle so it’s vital to understand the right use of gear oil. The GL-4 and GL-5 graded gear oils are the most commonly used fluids in the industry. A majority of cars use GL-4 graded gear oil. Automobiles like trucks and sports cars use GL-5 gear for heavy-duty or higher performance.