CVT stands for Continuously Variable Transmission, which uses a pair of variable-diameter pulleys and a belt or chain to provide unlimited gear ratios. CVTs are gaining popularity due to their efficiency, but they require dedicated CVT fluid to maximize their performance and life. CVT fluid is a specialized fluid that ensures the belt or chain remains in contact with the pulleys, which is why CVTs require specialized fluids rather than traditional automatic or manual transmission fluid. CVT fluids are formulated with the correct frictional requirements to guard against belt slipping, and using the wrong fluid will reduce performance and potentially wreck the transmission. The only difference between CVT fluid and ATF fluid is that CVT fluid has to produce more friction rather than less friction because it is running on a pulley system running by belts, and it has to be lubricated with more friction to keep the belt from slipping on the pulley system. It is important to keep the transmission fluid clean and at the correct level, and most vehicle manufacturers recommend changing CVT transmission fluid between 50,000kms and 90,000kms.