Designed to protect critical transmission components, Castrol’s range of automatic transmission fluids will help prolong component life. Discover the range.
Automatic transmissions are now more complex than ever. In fact, the automatic transmission is perhaps the most complicated mechanical component in a car. The automatic transmission combines electrical & mechanical systems, hydraulics and computer processors to shift smoothly through the gears and transfer engine power to the drive wheels. They place huge demands on automatic transmission fluids (also known as ATF oil).
Castrol offers a wide range of ATF fluids designed to protect critical transmission components and help prolong component life. These include our premium Castrol Transmax ATF fluids formulated with Smooth Drive Technology™ to provide smoother gear changes for longer and deliver a more relaxing drive.
Q: Why can I find EP on the label of ATF oils?
A: EP stands for extreme pressure. EP is an additive designed to stop metal-to-metal contact taking place between transmission components.
Q: Will synthetic gear oils and mineral gear oils mix together?
A: Yes, but always check the specifications in your manufacturer’s handbook to make sure that you are using an oil of the right specification.
Q: Are filled for life gear oils a good idea?
A: In theory these are fine but it’s a good idea to change ATF fluids periodically to flush out wear debris. You should consult your manufacturer’s handbook for recommendations.
An automatic transmission is a multi-speed transmission which transfers power from the engine to the driveshaft without the driver having to change gears.
Over the years there have been different types of ATF oil or trans fluid developed by different manufacturers and the introduction of new technologies.
Synthetic Fluids offer improved resistance to heat, cold, oxidation and sheer and are the reason why many manufacturers have eliminated the transmission dipstick. Their improved characteristics mean that there is less reason to access a vehicle’s transmission and its operation between services.
Automatic transmission fluids are distinctly different from fluids made for manual transmissions. The properties of a high performing ATF fluid are:
Key performance and protection requirements for manual transmissions:
Always consult your car’s handbook to make sure you find the correct fluid for your transmission.