Autors: Tashev, A. M., Stoyanov, Y. S., Dobrev, G. L., Bakardzhiev, V. I., Mitev, P. V.
Title: VISCOSITY ANALYSIS OF ENGINE OILS USING A DESIGN OF EXPERIMENT APPROACH
Keywords: design of experiment, engine oil, viscosity measurements

Abstract: This study investigates the viscosity characteristics of three engine oil types (0W40, 5W40, and 10W40) at three distinct temperatures (–15, 25, and 50°C) using a systematic Design of Experiment (DoE) approach. Regression models is developed to describe the relationship between temperature and viscosity, achieving an R² of 98.73% and a predicted R² of 90.30%, which confirms the model’s robustness and predictive capability. The analysis reveals that viscosity increases sig-nificantly at sub-zero temperatures, with pronounced differences among the oil types due to their distinct low-temperature specifications. In contrast, at higher temperatures, the viscosity differences become minimal. These findings offer valuable insights into the thermal performance of engine oils and provide a basis for optimising their application under varying operational conditions.

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Issue

Journal of Environmental Protection and Ecology, vol. 26, pp. 2649-2655, 2025, Albania, ISSN 13115065

Цитирания (Citation/s):
1. Mladenov G., Dimitrov K., Laskov L., Analytical Study of Methods and Diagnostic Tools for Evaluating Automotive Brake Fluid Quality Under Operational Conditions, 2026, Engineering Proceedings, issue 1, vol. 150, DOI 10.3390/engproc2026150023, eissn 26734591 - 2026 - в издания, индексирани в Scopus

Вид: статия в списание, публикация в реферирано издание, индексирана в Scopus