How Much Transmission Oil Should Be Added?
3 Answers
Transmission oil should be added 6 to 7 liters. Below is some information about transmission oil: 1. Machine circulation oil change: Generally requires about 4 liters of oil. Machine circulation oil change refers to changing the transmission oil while the vehicle is running, and the amount depends on the transmission type, usually starting from 4L. It is recommended to buy 5L, especially when the vehicle is frequently used, as some oil may be consumed. When changing the transmission oil, the oil filter screen should also be replaced at the same time. 2. Oil filter screen: Automatic transmissions generally have two methods of oil change, one is gravity change, and the other is machine circulation. For gravity change, 3~4L of oil is sufficient. For machine circulation, 12L or even a bit more is needed. With the gravity change method, the oil in the torque converter cannot be drained.
This really depends on your car's transmission type. Manual transmissions usually only need 2-4 liters - my old Focus takes just over 3 liters per change. Automatic transmissions are more complicated: a gravity drain typically requires 4-5 liters, but a flush with a machine might use 10+ liters. Never guess the amount! Last time I watched the mechanic demonstrate with the dipstick: park on level ground, run the engine to warm up until transmission fluid reaches about 60°C, then check the level between the two marks. Overfilling causes foaming and cooling issues, while underfilling leads to poor lubrication. Always consult your owner's manual or a professional technician.
The transmission oil capacity varies significantly between different car models. When I changed the oil for my Volkswagen POLO, the manual specified 2.7 liters. Nowadays, with more automatic transmission vehicles, the general requirement is 6-8 liters, and CVT transmissions might consume even more oil. There are three key points to note when doing it yourself: first, use the correct oil type, as German and Japanese cars require different oils; second, after changing the oil, test drive by shifting through all gears to allow the oil to circulate; third, the oil level appears higher when the engine is cold, so it's accurate only after the engine has warmed up. Once, my neighbor poured in a whole 5-liter bottle directly, resulting in the transmission overheating and triggering an alarm, and he had to take it to a repair shop to drain and refill the oil.
