The only car fluids most of us know are fuel (petrol/diesel) and coolant. But do you know there are six to seven different types of fluids used in your car. Let’s get familiar to all of them because each one of them plays a vital role in running your car smoothly.

Engine Oil


Engine oil is used to reduce friction between moving parts by lubricating them. The oil also serves in cleaning the engine by removing sludge and even helps in carrying away the heat.  There are different types of engine oil available in the market like for example synthetic, semi-synthetic and mineral. The quality of engine oil matters a lot; a good quality engine oil gives your car smooth running, high performance, low emissions and decent fuel economy.



Most of us atleast have heard about coolant, if not all. Coolant is used for keeping the engine cool. It can be very easily located as it is generally kept in big plastic reservoir. One should always make sure that the fluid is on indicated level else the car will start to heat up frequently. In absence of coolant, car’s gaskets can be blown away and engine can be ceased.

Transmission Oil


Transmission oil is not ‘as popular as’ coolant but it’s still is a very important car fluid. Its function is to make sure that the gearbox works smoothly. The oil is used between the different gears where it keeps the friction to a limited level. It also helps in keeping your gearbox sludge free. Gearbox oil is different for automatic and manual transmission, as in automatic transmission, the oil performs additional duties such as operate clutch and shifting gears. Unlike the engine oil, the transmission oil has to changed less frequently and you can refer to your owner’s manual to know the exact period because it varies from car to car.

Brake Oil


As the name suggests, brake oil is used in the brake assembly. It is a type of hydraulic fluid used in hydraulic brake and hydraulic clutch applications in cars. Brake oil is used to transfer force into pressure, and to amplify braking force. It works efficiently because liquids are not appreciably compressible and in their natural state the component molecules do not have internal voids and the molecules pack together well, so bulk forces are directly transferred to compress the fluid’s chemical bonds. Brake fluid is the medium of transfer and if you do not have optimum brake fluid level, then it can reduce braking power of your car.

Wiper Fluid


Well this is not exactly a chemical fluid for say. Wiper fluid is simply distill water mixed with  recommended cleaning shampoo.You can actually make the solution at home but first make sure you ask your authorized dealership about it.

Power Steering Oil


Power steering oil is used in hydraulic power steering and not in electric steering. The steering oil is the most important component of this hydraulic system, which runs under pressure to direct your wheels according to your input. It also lubricates the moving gears present in a steering system.

Other Oils

These include 4×4 transfer case oil, differential oil, etc which are present in AWD or 4×4 vehicles.

So, these are the fluids that you need to check for regularly and replace or top up accordingly. Always follow your car manufacturer’s recommendations for intervals which can seen from car owners manual.



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