Purpose and Specifications

Castrol 15F091 Transmission Oil is a premium fluid designed for automatic transmissions, powershift transmissions, wet disc brakes, and final drives in heavy-duty commercial vehicles and off-road equipment. It delivers smooth gear shifts, superior wear protection for gears and clutches, and reliable performance from -40°C cold starts to over 200°C high-heat conditions, keeping your transmission running cooler and longer.

This high-quality formula resists breakdown under extreme pressure, prevents sludge buildup, and maintains consistent friction for effortless operation. Expect extended drain intervals up to 6,000 hours or 500,000 km in approved applications with regular oil analysis, cutting maintenance costs and downtime.

When to Use / Replace?

• Use in Caterpillar TO-4 spec transmissions, hydraulic systems, and wet brakes for off-road trucks, loaders, and tractors needing top friction stability and anti-wear protection.
• Ideal for heavy loads, high temperatures, or dusty environments where standard fluids fail early.
• Replace every 4,000-6,000 hours (or 200,000-500,000 km) based on use, or sooner if shifting feels rough, slipping occurs, or fluid darkens. Shelf life is 5 years unopened in cool, dry storage.

FAQ

Q: Is Castrol 15F091 safe for my automatic transmission?
A: Yes, it's formulated for automatic and powershift transmissions, providing smooth shifts and protection without damaging clutches or seals.

Q: How often should I change it?
A: Every 4,000-6,000 hours or 200,000-500,000 km under heavy use; check your manual and use oil analysis for precision.

Q: Does it work in cold weather?
A: Absolutely, flows easily at -40°C for quick starts and protects up to 200°C+ for all-season reliability.