Oil samples were analysed with a Flash DSC1 of Mettler-Toledo. A Fast Liquid DSC sensor was used [7]. Asreference 2-butanol was used because of its low melting point of -115 °C and boiling point of 99.5 °C. The samplesize is on the order of 10 nl (~9 μg).The following temperature program was used: heating from -100 to 60 °C with a rate of 300 °C/s, isotherm at 60°C for 10 ms, cooling back to -100 °C at a rate of -100 °C/s, isotherm at -100 °C for 5 s, repeated five times. Firstheating curves are not shown because these differ from all the following heating curves, possibly due to the very slowcooling from room to base temperature. The machine was purged with dry nitrogen to prevent icing.Repeatability of measurements with the same chip shows a maximum standard deviation (SD) of typically 0.6 °Cfor the cooling peak temperature. Reproducibility of measurements with different chips shows an SD of typically 1°C. STARe software was used to analyse the thermograms, which have peaks that are exothermic up.