That Texan sun still has some power even by mid-November and so when finally it appeared on race day, and the track temperature rose as high as 37C, having at times during practice hovered below 20, it threw all those finely-honed engineering calculations askew.
No one had hard data and instead of being able to comfortably do a flat-out one-stop race, the teams instead went into the afternoon emphasising to their drivers they would keep them advised - after having paid very close attention to the tyre temperature monitors.
Sure enough, rear tyre heat degradation became the limiting factor - defining pretty much everyone's race as a cagey push/pull yin and yang affair. It was neither a flat-out contest - like Austin 2012 or Nurburgring, Hungaroring, Monza this year - nor a carefully pre-calculated 'drive to a delta' race we normally see otherwise.
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