Technical Conclusion:

The Comma Gear Oil SX 75W-90 GL-5 fails to meet the performance standards required for API GL-5 oils:

• Brookfield Viscosity: At -40°C, the viscosity of 154,000 cP exceeds the maximum allowable limit of 150,000 cP, which could impair cold-weather performance, leading to sluggish fluid flow.
• Pour Point: The pour point of -30°C is inadequate for 75W-90 oils, as it should ideally be -42°C for better cold-weather reliability.
• Weld Load: The 250 kg weld load is below the 350 kg minimum for API GL-5 oils, suggesting insufficient load-carrying capacity and reduced effectiveness under high-pressure conditions.