Rymax STOU SAE 15W-40 (205LT)
Rymax STOU SAE 15W-40 (205LT)
Rymax Lubricants · Styx STOU · Super Tractor Oil Universal · Authorised Distributor — South Africa
Rymax Styx STOU 15W-40 is a Super Tractor Oil Universal — one multifunctional lubricant for the engine, transmission, hydraulics, wet brakes and final drives of modern tractors. Replaces multiple tractor-specific products with one universal fluid. Available in 205L drum from Orbit Industrial for agricultural operations.
At a Glance
15W-40
SAE Grade
STOU
Product Type
Universal
Application
Multiple
Systems
205L
Pack Size
API CF
Engine Rating
Why Rymax Styx STOU 15W-40
One Oil for the Whole Tractor
Replaces separate engine oil, hydraulic fluid, transmission fluid and wet brake fluid — one product lubricating all major tractor systems.
Wet Brake Compatibility
Correct friction characteristics in wet brake systems — preventing brake chatter and maintaining consistent braking performance.
Hydraulic System Performance
Correct viscosity and additive characteristics for tractor hydraulic systems.
Engine Protection
CI-4/CF rating provides robust diesel engine protection with adequate TBN for acid neutralisation.
Transmission & Final Drive
EP additives protect transmission gears and final drives under high torque field operation loads.
Simplified Procurement
One product code replaces multiple SKUs — reducing storage requirements and simplifying lubrication management.
Recommended Applications
Modern Tractor Engines
Diesel engines in John Deere, Case IH, New Holland, Massey Ferguson and Deutz-Fahr tractors where STOU is approved.
Tractor Hydraulic Systems
Hydraulic systems controlling implement lift, three-point hitch and auxiliary circuits.
Power Shift Transmissions
Power shift and synchronized tractor transmissions.
Wet Brakes & PTO
Wet disc brakes and PTO clutch systems.
Final Drives & Differentials
Tractor final drives, differential and axle drives.
Agricultural Fleet Management
Farm operations running multiple tractors where STOU simplifies procurement.
Specifications & Approvals
Performance Levels
OEM Approvals
Technical Properties
| Property | Test Method | Value |
|---|---|---|
| SAE Grade | — | 15W-40 |
| Kinematic Viscosity @ 100°C | ASTM D445 | 14.5 cSt |
| Kinematic Viscosity @ 40°C | ASTM D445 | 105 cSt |
| Viscosity Index | ASTM D2270 | 138 |
| Flash Point | ASTM D92 | 214°C |
| Pour Point | ASTM D97 | -27°C |
| Density @ 15°C | ASTM D4052 | 874 kg/m³ |
Available Pack Sizes
205 Litre Drum
Price on request
Bulk Tanker
Price on request
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