[Adam43]

Originally Posted by canaglia

I Anyway, as far I know, fuel for LMP1 is spec, basically the same type and same supplier for everyone.... why ACO is using "kg" as unit of measure?
it's not like f1 where each engine manufacturer along to oil companies partners developes its confidential petrol mixture. In that case is logical to use kg and not liters, because 1L of petrol is much heavier than standard 0,75kg

The last bit is simply that that the volume of fuel changes with temperature and the energy contained will be consistent with mass.