^^ rutan
weird...
Best way I understood it was - we used to put the fuel samples in the fridge for 5 minutes cause otherwise even our @15 temps wouldn't make sense on those hot days and with the friction on the front container from the tanker it was way off. Cool the sample down so the sg was within spec so we could accept the fuel. If hotter than his calculated @15 we would be getting ripped off cause the volume over such a large amount of fuel would be out and theoretically wouldn't fit in the tank... As the sample was from the owest point it was closest the road and the front so was the hottest. By the time we let the fuel in and it mixed with the colder fuel it would always fit.
