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Reducing Oil Waste Through Condition-Based Maintenance: A Diagnostic Study Using FTIR and Viscosity Monitoring

Author

Listed:
  • Artur Wolak

    (Department of Quality and Safety of Industrial Products, Cracow University of Economics, Sienkiewicza 4 Str., 30-033 Krakow, Poland)

  • Wojciech Krasodomski

    (The Oil and Gas Institute—National Research Institute, Lubicz 25A, 31-509 Krakow, Poland)

Abstract

Engine oil condition critically affects vehicle performance, fuel efficiency, and engine durability. While conventional oil change strategies are based on fixed intervals or mileage thresholds, they often neglect real operating conditions and the actual state of lubricant degradation. This study investigates nine used engine oil samples collected from passenger vehicles operating in diverse environments, including city traffic, highway routes, hybrid systems, and diesel engines. The oils were assessed using kinematic viscosity measurements and Fourier transform infrared (FTIR) spectroscopy to monitor key degradation indicators—oxidation, nitration, sulfonation, fuel dilution, soot contamination, and additive depletion. Each case is fully documented with detailed operational histories, facilitating a nuanced, real-world understanding of oil aging. The results demonstrate that degradation levels vary considerably, even under similar mileage ranges, highlighting the influence of urban usage patterns and engine design. In several cases, premature or delayed oil changes were observed, confirming that standard service intervals may be suboptimal. FTIR proved effective in detecting subtle chemical transformations, particularly in samples affected by biofuel components or prolonged thermal stress. These findings emphasize the value of integrating laboratory diagnostics into oil change decision-making and support more tailored maintenance strategies. Such an approach can reduce unnecessary oil replacement, limit waste generation, and extend engine lifespan, contributing to both environmental and economic sustainability. This study supports the implementation of condition-based oil change strategies to minimize lubricant waste and promote maintenance practices aligned with sustainability principles.

Suggested Citation

  • Artur Wolak & Wojciech Krasodomski, 2025. "Reducing Oil Waste Through Condition-Based Maintenance: A Diagnostic Study Using FTIR and Viscosity Monitoring," Sustainability, MDPI, vol. 17(18), pages 1-15, September.
    • Handle: RePEc:gam:jsusta:v:17:y:2025:i:18:p:8214-:d:1747972
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    References listed on IDEAS

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