1. Core Performance Metrics You Can't Ignore

Selecting lubricant additives requires evaluating six critical parameters through ASTM/ISO standardized testing:

• Viscosity Index (VI)
  Target VI >160 for equipment operating between -30 C to 150 C. Group IV PAO base oils typically achieve VI 140-180.
• Four-Ball Wear Scar Diameter
  < 0.45mm under ASTM D4172 conditions indicates premium anti-wear performance.
• Total Base Number (TBN)
  Diesel engine oils require TBN 7-10 mgKOH/g to neutralize acidic combustion byproducts.

2. Scenario-Based Selection Strategies

Automotive Engines

• Gasoline: API SN Plus with  0.5% sulfated ash
• Diesel: CJ-4 certified low SAPS (Sulfated Ash/Phosphorus/Sulfur) additives

Industrial Gearboxes

• ISO 6743-6 L-CKD specification
• EP additives with FZG  12 stage load capacity

Extreme Environments

• Arctic: Pour point <-45 C with T803 polyalkylmethacrylate
• High-temperature: Thermal stability >300 C (e.g., T706 polymethacrylate)

3. Cost-Performance Optimization

Balancing performance and budget requires strategic approaches:

• Pre-blended Packages: T3002 series reduces formulation costs by 18-25%
• Lifecycle Analysis: High-performance additives extend oil change intervals 2  (per ISO 4406)
• Compatibility Testing: 72-hour storage stability test at 100 C prevents additive dropout

Conclusion
Effective additive selection combines technical specifications with operational realities. By cross-referencing performance data against application requirements, users can achieve optimal lubrication outcomes while controlling costs.