The time is already there on the first column of the log.
Select the log you want to export and use the icons at the bottom of the page to export that log into CSV format. You may need to edit that file in an excel/openoffice application to trim the unnecessary intervals out.
2008 Cosmic Blue Mazda 3MPS
Built engine + WMI + GTX3071 gen2, ~550BHP @35PSI
2008 Icy Blue Mazda CX7
Built engine and stock exhaust (YES!!), JBR3" + GTX2867 gen2 + Autotech HPFP, self-tuned to 360-ish BHP