*Stefan Hofmann, Thomas Lohner, Karsten Stahl (Technical University of Munich (TUM), Gear Research Center (FZG), Boltzmannstraße 15, 85748 Garching near Munich, Germany)

*Moritsugu Kasai¹, Tatsuya Kusumoto¹, Mikihito Takenaka² (1. Idemitsu Kosan Co., Ltd., Japan, 2. Kyoto University, Japan)

*Tatsuya Kusumoto¹, Moritsugu Kasai¹, Mikihito Takenaka² (1. Idemitsu Kosan Co., Ltd., Japan, 2. Kyoto University, Japan)

*Keiji Asada^1,2, Juliette Cayer-Barrioz¹, Denis Mazuyer¹ (1. Laboratoire de Tribologie et Dynamique des Systèmes, CNRS UMR 5513, Ecole Centrale de Lyon, France, 2. Lubricants Research Laboratory, Idemitsu Kosan Co.,Ltd., Japan)

*Naoya Hashizume, Riki Takano, Takayuki Tokoroyama, Noritsugu Umehara (Nagoya University, Japan)