Automatic transmission oil is essential for the proper functioning of the gearbox. It lubricates and cools down the moving parts of the transmission, which prevents wear and excessive friction between them. Moreover, automatic transmission oil also helps to transfer the engine’s power to the vehicle’s wheels more efficiently, which allows a better performance and greater durability of the transmission system. It is important to change the automatic transmission oil as recommended by the vehicle manufacturer to maintain proper functioning and prevent costly breakdowns in the future.