Purpose and Specifications

CASTROL MTX 151AD4 is a mineral-based transmission fluid designed for motorcycles and light commercial vehicles with 2-stroke and 4-stroke engines. With a 10W-40 viscosity grade, this fluid flows smoothly in cold conditions while maintaining protective thickness at operating temperatures, ensuring reliable gear shifts and smooth transmission performance across varying weather conditions.

This transmission oil meets API SG and JASO MA-2 specifications, providing essential protection against wear on gears, synchronizers, and bearings. The fluid's specialized additives reduce metal-to-metal contact, extending the life of transmission components and preventing costly damage.

When to Use / Replace?

CASTROL MTX 151AD4 is ideal for:

• Motorcycles with manual transmissions (both 2-stroke and 4-stroke engines)
• Light commercial vehicles and small trucks requiring API SG-rated transmission fluid
• Vehicles manufactured between 1983 and 2006, including NISSAN Cabstar and Trade series

For replacement intervals, follow your vehicle manufacturer's recommendations in the owner's manual. Typical transmission fluid changes occur every 20,000 to 40,000 kilometers or annually, whichever comes first. More frequent changes may be needed under severe riding conditions such as heavy towing, frequent stop-and-go traffic, or extreme temperatures.

The fluid operates effectively between -10°C and +100°C, making it suitable for most climates. Store in a cool, dry place away from direct sunlight; shelf life is typically 3-5 years when properly sealed.

Frequently Asked Questions

Q: Can I use this fluid in automatic transmissions?
A: No. CASTROL MTX 151AD4 is formulated exclusively for manual transmissions. Automatic transmissions require different ATF (Automatic Transmission Fluid) specifications. Always check your owner's manual for the correct fluid type.

Q: What does the 10W-40 rating mean?
A: The '10W' indicates the fluid flows easily at cold temperatures (down to -10°C), while '40' means it maintains proper thickness at high operating temperatures. This balance ensures smooth shifting in winter and reliable protection during summer riding.

Q: Is this a synthetic or mineral oil?
A: CASTROL MTX 151AD4 is a mineral-based oil, not synthetic. Mineral oils are cost-effective and suitable for traditional motorcycle and light commercial vehicle transmissions. If your vehicle requires synthetic transmission fluid, consult your owner's manual.