fuchs silkolene BOA SAE 80W-90 High Performance Hypoid Gear Oil & Shaft Drive Oil - 1L Boa 80W-90 High performance Hypoid Gear oil recommended for motorcycle shaft drives/final drives. Also suitable for most manual gearboxes and steering units. SAE 80W, SAE 90 (or SAE 80W-90). Specification API GL-4 or API GL-5 The Gear Oil That is being sold by Think Bike Gear is guaranteed to be unused and Brand New to the customer, if you have any queries or questions feel free to contact us and we can answer any question to the best of our ability.