Reliable Oil for Manual Transmissions

Synchronized manual transmissions are commonly used in modern vehicles. Most of these gearboxes feature synchronizers with bronze components. For such transmissions, it is essential to use gear oils with a moderate level of anti-seize additives, specifically those meeting the API GL-4 classification. These oils facilitate smooth gear shifting by ensuring proper contact between the synchronizer surfaces.

Using gear oils with a high concentration of anti-seize additives, such as those classified as API GL-5, can negatively affect gear shifting and lead to premature wear of the bronze synchronizer components.

For optimal performance and protection, we recommend HARTOL GEAR OIL SAE 80W-90. This oil offers a high level of protection under the API GL-4 classification while ensuring the proven reliability of SAE 80W-90 viscosity.

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