Castrol Syngear is a premium, synthetic, heavy duty, multi-grade gear lubricant that meets API GL-5 service. Castrol Syngear provides excellent cold weather performance, outstanding stability under higher than normal operating temperatures, and substantial load carrying ability for cooler operation and longer equipment life. Castrol Syngear is ideal for severe service environments and customers who want to extend service intervals.

Castrol Syngear Lubricants will meet or exceed all performance requirements of the following applications:
  • API GS-5
  • API MT-1
  • MIL-PRF-2105E
  • SAE J2360
  • Dana SHAES 429 Rev. A
  • Dana SHAES 256 Rev. C
  • Mack Truck GO-J Plus
  • International TMS 6816
Castrol Syngear contains 100% synthetic base stocks for outstanding oxidation control and thermal stability for improved fuel economy and longer equipment life. A premium additive package inhibits rust, corrosion, and wear to protect against premature bearing failure and gear tooth wear. Excellent shear stability protects against viscosity loss to safely extend service intervals. Castrol Syngear lubricants are accepted and approved by the Eaton Corporation as alternatives to their Eaton Roadranger gear oils and acceptable for use in conjunction with the Eaton Roadranger Extended Warranties.