Peer review is the driving force of journal development, and reviewers are gatekeepers who ensure that Lubricants maintains its standards for the high quality of its published papers. Thanks to the cooperation of our reviewers, in 2020, the median time to first decision was 17 days and the median time to publication was 42 days. The editors would like to express their sincere gratitude to the following reviewers for their precious time and dedication, regardless of whether the papers were finally published:
| Abdul Kudus, Sakhiah | Mazzù, Angelo |
| Abellan-Nebot, Jose Vicente | Messaadi, Maha |
| Ahmad, Muhammad Sajjad | Mia, Mozammel |
| Akbarzadeh, Saleh | Mohammed, Abdul Samad |
| Ali, W. Y. | Molea, Andreia |
| Aniołek, Krzysztof | Molter, Jürgen |
| Arias-Pardilla, Joaquín | Mora, Jose R. |
| Avilés, M. D. | Moreno, Karla J. |
| Azmi, A. I. | Müller, Michael |
| Bader, Norbert | Nadolny, Krzysztof |
| Bajpai, Ankur | Nagit, Gheorghe |
| Balitskii, Alexander | Naldi, Lorenzo |
| Bavasso, Irene | Nevshupa, Roman A |
| Bayada, Guy | Niederhofer, P. |
| Bayat, Reza | Nikas, George K. |
| Bayer, Ilker | Nikolakopoulos, Pantelis G. |
| Bedolla-Gil, Yaneth | Nosko, Oleksii |
| Bełdowski, Piotr | Nosonovsky, Michael |
| Belin, Michel | Oday Ibraheem, Abdullah |
| Bewsher, Rickie | Olaru, Dumitru |
| Biernat, Krzysztof | Orellana, Luis Felipe |
| Björling, Marcus | Ortega Vega, Maria Rita |
| Bormashenko, Edward | Pacella, Manuela |
| Bravo-Sanchez, M. G. | Padmanabhan, Jagannath |
| Brechtl, Jamieson | Paleu, Viorel |
| Brink, Tobias | Panin, Sergey |
| Buzio, Renato | Panossian, Zehbour |
| Cáceres, Luis | Park, Changkyoo |
| Cao, Yifeng | Paszkowski, Maciej |
| Chatterton, Steven | Peña-Parás, Laura |
| Chen, Guangxiong | Persson, Bo |
| Chen, Zhe | Pervaiz, Salman |
| Cho, Minhaeng Haing | Piasecki, Adam |
| Ciavarella, Michele | Podrabinnik, Pavel A. |
| Colombo, Federico | Polozov, Igor |
| Conceição Junior, Pedro Oliveira | Pougoum, Fabrice |
| Costa, Henara | Qin, Liguo |
| Cousseau, Tiago | Qu, Jun |
| Cretu, Spiridon | Radulescu, Irina |
| DÁmato, Roberto | Rahman, Mohammad Mizanur |
| Delgado Canto, Miguel Ángel | Rahmani, Ramin |
| Deng, Weilin | Raimondo, Marialuigia |
| Devlin, Mark T. | Rapoport, Lev |
| Dijksman, Joshua A. | Rećko, Katarzyna |
| Dmitriev, Andrey | Ricciardi, Vincenzo |
| Dohnal, Fadi | Romanov, D. A. |
| Dolatabadi, Nader | Rosenkranz, Andreas |
| Dong, Guangneng | Rouzic, Julian Le |
| Dong, Longjun | Roy, Sougata |
| Donnet, Christophe | Ruggiero, Alessandro |
| Dube, Michael J | Sakar, Mohan |
| Dundulis, Gintautas | Santos, José Carlos Oliveira |
| Etsion, I. | Sawae, Yoshinori |
| Evaristo, Manuel | Scheichl, Bernhard |
| Fan, Xiaoqiang | Schmidt, Marcus |
| Fang, Congcong | Schmidt, Tannin |
| Feng, Guang-Liang | Sedlák, Petr |
| Fiori, Stefano | Senatore, Adolfo |
| Forero, Jorge Duarte | Shyu, Shiuh-Hwa |
| Franceschini, Andreas | Siczek, Krzysztof |
| Fridric, V. | Sidebottom, Mark |
| Gao, Hongyu (Larry) | Silvestri, Marco |
| Gao, Wenjun | Simon, Vilmos |
| Georgiou, Emmanuel P. | Singh, Manjesh Kumar |
| Geringer, Jean | Sivakumar, Poopalasingam |
| Gewen, Yi | Sivayogan, Gajarajan |
| Gharam, Ahmed | Sola, Ramona |
| Glukhova, Olga E. | Song, Hengxu |
| Golgovici, Florentina | Stack, Margaret |
| Gómez, Xabier | Streator, Jeffrey |
| Gonçalves, David | Stupkiewicz, Stanisłlaw |
| Gorash, Yevgen | Sugimura, Joichi |
| Habchi, Wassim | Sun, Jiayi |
| Hagar, Mohamed | Sun, Yong |
| Hajžman, Michal | Suo, Shuangfu |
| Halama, Radim | Surzhenkov, Andrei |
| He, Qiang | Swinarew, Andrzej |
| He, Xin | Ta, Thi Dinh |
| Hee, Ay Ching | Tadmor, Rafael |
| Hernández-Sierra, María T. | Taha-Tijerina, Jaime |
| Hong, Tao | Taha-Tijerina, José Jaime |
| Hsu, Cheng-Hsun | Takahashi, Shun |
| Hu, Ming | Tang, Wei |
| Huang, Ming | Tarasov, Sergei Yu |
| Huang, Xiaoming | Taylor, Robert Ian |
| Huang, Yuli | Tomović, Radoslav |
| Jacobs, Georg | Tutak, Wojciech |
| Ji, Xiulin | Tysoe, Wilfred |
| Jiang, Shuwen | Van, Anh Nguyen |
| Jimenez Ballesta, Ana Eva | Velicu, Radu |
| Johnson, David | Vereshchaka, Alexey A. |
| Joseph, Olufunmilayo | Viáfara, Cristian C. |
| Kalligeros, Stamatis Spyridon | Vilhena, Luís |
| Karpetis, Adonios | Walvekar, Aditya |
| Kazama, Toshiharu | Wan, Yong |
| Khonsari, Michael | Wang, Chunge |
| Klekotka, Marcin | Wang, Zhaoqiang |
| Koc, Burhanettin | Wasilczuk, Michał |
| Koc, Ilker Murat | Wheeler, D. W. |
| Kostal, David | Wiewiórowska, Sylwia |
| Koutsovasilis, Panagiotis | Wojciechowski, Łukasz |
| Kovalchenko, Andrii M. | Wolfgang, Molnar |
| Kovalcik, Adriana | Woloszynski, Tomasz |
| Kozdrach, Rafał | Woydt, Mathias |
| Kuhn, Erik | Wu, Jian |
| Kumara, Chanaka Kapila | Xiao, Shaoping |
| Kyziol, Karol | Xie, Z. L. |
| Lanza, Antonio | Xu, Chonghai |
| Larsson, Roland | Xu, Zhenlong |
| Lebon, Frédéric | Yahiaoui, Malik |
| Leclère, Philippe | Yamamoto, Makoto |
| Lee, Hung Bin | Yang, Qi |
| Li, Jiusheng | Yu, Wenbin |
| Li, Qiang | Zaarour, Moussa |
| Lin, Weifeng | Zakowski, Krzysztof |
| Lomonaco, Diego | Zampieri, Nicolò |
| López, Enriqueta | Zavos, Anastasios |
| Lü, Yanjun | Zekonyte, Jurgita |
| Lubrecht, Ton | Zhang, Laichang |
| Lugt, Piet | Zhang, Lu |
| Luo, Quanshun | Zhang, Yanhu |
| Machado, Tiago Henrique | Zhang, Yuyan |
| Mann, James B. | Zhao, Gai |
| Marian, Max | Zhao, Jingyi |
| Marko, Matthew | Zhmud, Boris |
| Martin, Jean | Zhou, Miao-lei |
| Martini, Ashlie | Zhou, Yan |
| Maru, Marcia M. | Zhu, Juanjuan |
| Maruschak, Pavlo | Ziegltrum, Andreas |
| Masuko, Masabumi | Zolper, Thomas |
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