Castrol Syntrans 75W-85 is a full synthetic transmission fluid recommended for most commercial vehicle manual transmissions (truck, bus, light commercial vehicle) where API GL-4 lubricants are required. These transmissions are generally larger and subjected to higher loads and temperatures than those in passenger cars; this product was developed for these particular requirements and is approved by a number of manufacturers.

Features and Benefits

  • Excellent thermal and oxidative stability maintains transmission cleanliness and lubricant performance, allowing extended drain capability.
  • Synthetic formulation provides a reduction in operating temperatures, giving longer component and lubricant life.
  • Superb cold flow characteristics give smoother gear shifts at low temperatures.
  • High shear stability maintains lubricant performance throughout the drain interval.
  • Good wear and EP performance ensures component protection under high load conditions, reducing downtime and service costs.

Industry Specifications and OEM Approvals

  • API GL4
  • MAN 341 E4
  • MB approval 235.4
  • Volvo 97307
  • Eaton 500,000km drain Europe (service bulletin 2273)