Purpose and Specifications

Castrol 15D678 is a premium semi-synthetic hydraulic oil in a 5-liter bottle, engineered for heavy-duty transmissions and hydraulic systems in trucks, buses, and industrial equipment. It delivers outstanding anti-wear protection, keeping pumps, valves, and gears running smoothly even under high pressure and heavy loads.

This oil shines with approvals from top manufacturers like Allison TES 389, MB 236.9/236.93, MAN 339 Typ L1/V1/Z1, ZF TE-ML 04D/14A, Voith H55.6335.xx, and Volvo 97341, plus Ford MERCON. It handles operating temperatures up to 99°C (210°F) for normal use, with excellent shear stability that maintains performance across wide temp swings from -30°C to 100°C.

• Prolongs equipment life: Superior rust, oxidation, and wear protection reduces downtime and extends component lifespan.
• Wide temp range: High viscosity index ensures smooth flow in cold starts and stays thick under heat.
• Water separation: Quickly sheds moisture to prevent corrosion and maintain efficiency.
• Long service intervals: Up to 18,000+ hours oxidation stability means fewer changes, typically every 50,000-100,000 km or 24 months in heavy-duty use.

When to Use / Replace?

Use Castrol 15D678 in automatic transmissions, power steering, wet brakes, and hydraulic lifts where OEM specs match its approvals. Ideal for commercial vehicles operating in demanding conditions like construction, mining, or long-haul trucking.

Replace every 50,000-100,000 km or 18-24 months, or sooner if oil darkens, contaminates with water, or loses viscosity. Monitor during routine services; shelf life is 3-5 years unopened in cool, dry storage.

FAQ

Q: Is this oil suitable for my Allison transmission?
A: Yes, it meets Allison TES 389 and C4 standards, providing proven protection for smooth shifting and long life.

Q: What temps can it handle?
A: Operates reliably from -30°C cold starts up to 99°C continuous, perfect for varying climates.

Q: How often should I change it?
A: Every 50,000-100,000 km or 24 months in heavy use; check fluid condition regularly for best results.