Application Bulletin: ZDDP alternative for GL-5 Gear Oil (80W-90)
Ultrium™ 6700 - Zero-SAPS, Ashless Anti-Wear Technology as a replacement in lubricant formulations
The drive to minimize sulphated ash, phosphorus and sulfur (SAPS) content in gear oil formulations has increased primarily to address debits of yellow-metal corrosion, fluid degradation, potential for excessive wear and non-metallic compatibility resulting from sulfur and phosphorus-based aggressive chemistry.
Traditional anti-wear additives such as ZDDP, while highly effective in boundary lubrication regimes, present challenges due to their thermal instability, volatility, and contribution to SAPS levels. This necessitates the development of alternate additive chemistries that maintain wear protection under highly loaded conditions without compromising hardware corrosion, additive degradation and ensuring smooth gear engagement.
Ultrium Technology in ActionAurorium Ultrium® 6700 represents a next-generation multifunctional polyester additive engineered to meet the increasingly stringent demands of high-performance gear lubrication systems. Its molecular architecture—characterized by a sulfur- and phosphorus-free ashless design—delivers exceptional oxidative stability and thermal robustness while maintaining full compatibility with conventional ZDDP and other anti-wear chemistries. This unique synergy enables formulators to push the boundaries of gear oil durability, load-carrying capacity, and cleanliness without compromising on regulatory or environmental constraints. | 
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Key Features of Ultrium 6700 Additive Solution in Gear Oil:
- Minimize Environmental Impact
Free of sulfur, phosphorus, and metals - Multi-functional Performance
Delivers anti-wear and corrosion protection in one package - Formulation Flexibility
Compatible across diverse base oils and reduces formulation complexity - Enhanced Thermal Stability
Outperforms ZDDP in oxidation resistance - Simplified Supply Chain
Supports global companies streamlining their ingredients
Why Choose Ultrium 6700 for your Gear Oil Formulations?
Ultrium 6700 functions by developing a robust boundary film on the metal surface thereby providing asperity level protection to highly loaded components. Ultrium 6700 also contributes to corrosion mitigation, further enhancing the reliability of the finished lubricant under demanding gear operating conditions. When formulating for advanced gear oil, Ultrium 6700 can be used as a multi-functional top-treat additive, showing improvements in wear results. For new gear oil products with ZDDP as primary anti-wear chemistry, demonstration of synergistic effects with Ultrium 6700 have been shown. |
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Performance Comparison: Ultrium 6700 as a top-treat in GL-5 Gear Oil (SAE 80W-90)
Getting Started with Ultrium 6700
To learn more about how Ultrium 6700 can improve your gear oil formulations, visit Aurorium.com for technical datasheets, performance insights, and contact us directly for customized recommendations.