Castrol Power1 4T 10W-40 Full Synthetic Motorcycle Oil, 1 QT x6 — Trizone Protection & Improved Throttle Response

Castrol Power1 4T 10W-40 is a full-synthetic motorcycle engine oil engineered to improve throttle response and protect engine, gearbox and wet clutch systems.

Designed for riders who push their bikes for everyday commuting or spirited weekends, Castrol Power1 4T combines race-derived chemistry with Trizone protection to address the distinct needs of four-stroke motorcycles. This 10W-40 viscosity oil offers fast flow at start-up, strong shear stability under load, and compatibility with both air- and water-cooled engines, meeting API SL and JASO MA-2 industry standards.

How does this oil improve acceleration and throttle feel?

Castrol's Power Release Formula is tuned to reduce internal friction so the engine responds more quickly when you open the throttle. Improved flow characteristics at operating temperatures let moving parts engage more smoothly, translating chemical formulation into a more immediate riding sensation.

• Full synthetic base oils for rapid circulation on startup
• Race-derived additives that lower friction for quicker rev response
• Consistent viscosity 10W-40 for predictable power delivery

What protection does Trizone technology deliver for my motorcycle?

Trizone technology is formulated to safeguard the three critical systems in a four-stroke motorcycle: the engine, wet clutch and gearbox. It balances frictional properties so the clutch grabs cleanly while the gearbox and engine stay shielded from wear and thermal stress.

• Engine wear reduction under high load
• Clutch-friendly friction properties to prevent slippage
• Gearbox protection against scuffing and gear wear

Is this oil suitable for different engine cooling types and extreme conditions?

Yes — Power1 4T is formulated for both extreme high-temperature air-cooled engines and water-cooled designs, offering stable performance across a wide range of riding conditions. Excellent shear stability helps maintain viscosity under heavy loads and prolonged heat exposure.

• Stable viscosity in sustained high temperatures
• Designed for both air-cooled and liquid-cooled motorcycles
• Shear-resistant additives to prevent viscosity breakdown

Which industry standards and compatibility should I expect?

Castrol Power1 4T 10W-40 meets API SL and JASO MA-2 specifications, ensuring modern four-stroke motorcycles with wet clutches and shared oil systems get appropriate friction and protection. Always consult your motorcycle’s owner manual to confirm recommended viscosity and certifications.

• Meets API SL for engine protection and performance
• JASO MA-2 certified for wet clutch compatibility
• Suitable for many commuter, sport and touring four-stroke bikes

Who is this for: Castrol Power1 4T 10W-40 in the 1-quart pack of six is aimed at riders who want a reliable, performance-focused synthetic oil for regular maintenance or frequent servicing. It fits owners of modern four-stroke motorcycles seeking improved throttle response, consistent protection for engine, gearbox and clutch, and a product that conforms to established API and JASO standards. If you perform your own oil changes, maintain multiple bikes, or prefer buying multi-packs for convenience, this six-quart set provides a practical supply of full-synthetic oil.