Synthetic engine oils play a crucial role in turbocharged diesel engine performance, especially under challenging conditions like towing and high compression ratios. This dyno test compares two 15W-40 oils meeting Cummins CES 20086 specifications: Chevron Delo® 400 XLE SB and TriboDyn® TRI-EX2.

Test Vehicle Specifications:

• 2005 Dodge Ram 3500
• 5.9-liter Cummins inline-six engine
• 208,500 miles
• Modified with AEM Cold Air Intake and MBRP 4" exhaust
• Factory ECU and catalytic converter

Oil Comparison:

• Chevron Delo 400 XLE SB

  • Synthetic blend
  • Cost: $71.79 (3 gallons)
  • Features: Extended oil life, high viscosity index
  • Flash point: 446°F

• TriboDyn TRI-EX2

  • Full synthetic with ceramic technology
  • Cost: $209 (3 gallons)
  • Features: Patented ceramic coating technology
  • Forms protective ceramic film in high-stress areas

Dyno Test Results:

• Used Delo 400: 286.72 hp
• New Delo 400: 287.61 hp
• TriboDyn TRI-EX2: 294.93 hp
• Net gain: 7.32 hp

Fuel Economy Impact:

• Projected improvement: 2.55%
• Current MPG: 14.0
• Expected MPG: 14.4
• Calculated savings over 15,000 miles: $144.34
• Net savings after oil cost difference: $7.13

Key Findings:

• TriboDyn TRI-EX2 significantly reduced engine friction
• Power gains were consistent across the entire power curve
• Higher initial cost offset by fuel savings
• Ceramic coating technology provides lasting protection

The test demonstrates that while TriboDyn TRI-EX2 comes at a premium price, its performance benefits and fuel savings can justify the investment for high-mileage diesel applications.

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