Which of the following is the correct specification for gear oil used in forklifts?

The specification for gear oil used in forklifts is typically SAE80 because it provides the right balance of viscosity and protection needed for the gears under various operating conditions. Gear oil is essential for lubricating the gearbox, reducing wear, and ensuring smooth operation.

SAE80 is formulated to handle the high pressures and temperatures commonly experienced in forklift operations, thus ensuring that the gearbox functions efficiently and has a longer lifespan. The viscosity rating means it is suitable for relatively moderate temperatures while still maintaining protective qualities.

While other options might be suitable in different applications, they do not provide the same level of protection or operational efficiency as SAE80 for forklift gearboxes. Therefore, the selection of SAE80 is critical for maintaining proper performance and safety in forklift operations.