I'm glad you pointed that out, it's worth reading it again to be sure.What are the exact words that Castrol used on the back of the bottle that lead you to your conclusion? It may "work" in an LSD, but it may still need the friction modifier added.
I've always seen the "...for makeup of oil in limited slip differentials." - - In other words, it would need the friction modifier.
But....I don't think it says that, I just went out in the snow and grabbed the bottles from my car.
Let's read! (warning 8 megapixel photo!)
- Exceeds the service fill requirements of conventional and limited-slip differentials.
- Fully compatible with all conventional and synthetic API-GL5 gear oils.
- Meets the service fill requirements of conventional and limited slip differentials.
- Engineered for passenger cars and light trucks operating under high-stress conditions.