Motorex PENTA SAE 75W90
From long-haul tourers to rugged adventure bikes, if you’re clocking up KMs on a large capacity motorcycle, chances are that your bike relies on a shaft drive system to deliver power to the rear wheel.
Here’s a scenario.
You’ve got a shaft-driven adventure/touring bike, such as a BMW GS, Yamaha Super Tenere, or Honda VFR1200, and it’s due for a final-drive service. The shelves are stacked with wet-clutch compatible engine oils, gear oils and chain lubes.

Shaft-specific GL-5 synthetic gear oil? You’re lucky to find one option, let alone a quality one from a brand with genuine engineering credentials. The loading characteristics of a bevel gear final drive are brutal. Subject to high torque, extreme pressures and operating temperatures that would send poor oil into early retirement.
This is the problem Motorex PENTA SAE 75W90 was engineered to solve.

The Swiss tribology specialists at Motorex don’t do half measures. PENTA SAE 75W90 is a fully synthetic oil developed specifically for the highly stressed final drives of modern, high-performance shaft-driven motorcycles. It easily meets & exceeds API GL-5, which is the benchmark specification.
Motorex has a rich history of developing lubricants for motorsport and high-performance machinery. PENTA SAE 75W/90 isn’t a product that fell out of a rebadging exercise; it’s a deliberate formulation for a specific and demanding application. Recommended for any model that requires a 75W90 Viscosity GL-5 specification.

Motorex PENTA Attributes
- Fully-synthetic
- Excellent load carrying capacity
- High resistance to ageing
- Excellent anti-foaming behaviour
- High oxidation and shear stability
- Good air release
- Optimum low-temperature behaviour
Motorex PENTA available in:
- Penta SAE 75W90 – 1L $49.95 – MP75901 (API)
- Penta SAE 75W90 – 4L $193.95 – MP75904 (GL-5)
If your final drive is due for fresh oil or if you genuinely can’t remember when you last changed it (we’re not here to judge, but also, sort it out), PENTA is available through Motorex dealers across Australia.
Click here to view the range of Shaft Drive Oils available at Motorex Australia:
https://www.motorexoil.com.au/product-category/shaft-drive/






