“…Soon after the work by Yamaguchi et al [48], in 1990 Choi et al [50] published an appraisal of the`total capacitance method' for determining the minimum oil ®lm thickness in the main bearings of a four-cylinder engine. As part of their investigation, they measured the journal temperature and found it to vary by up to 12 K across its diameter, the`outer' side, which generally coincided with the minimum oil ®lm thickness, being the hottest.…”